22201134-于子昂第二次blog作业
关于第四到第六次的pta题目集的总结与心得
前言：
这三次题目集用到了正则表达式以及各种类的调用，同时题量偏大，难度一般吧（虽然我没有写完）
设计与分析：
关于题目集4的T7-1：
我当时没写。。。。就和题目集6的T7-1一起讲吧，反正是迭代的题。
关于题目集5的T7-5：
题目：
就是给三种方法，要不算日期前多少天是啥日期，要不是后多少天，要不是两个日期之间隔了多少天。
它是先前日期题的迭代，主要区别在于使用了聚合的关系将不同类一一关联了。先看源码：
import java.util.Scanner; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); int i = input.nextInt(); if(i == 1) { DateUtil dateutil = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()); i = input.nextInt(); if(!dateutil.checkInputValidity() || i < 0) { System.out.println("Wrong Format"); System.exit(0); } else { System.out.print(dateutil.showDate() + " next " + i + " days is:"); dateutil.getNextNDays(i); System.out.println(dateutil.showDate()); } } else if(i == 2) { DateUtil dateutil = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()); i = input.nextInt(); if(!dateutil.checkInputValidity() || i < 0) { System.out.println("Wrong Format"); System.exit(0); } else { System.out.print(dateutil.showDate() + " previous " + i + " days is:"); dateutil.getPreviousNDays(i); System.out.println(dateutil.showDate()); } } else if(i == 3) { DateUtil dateutil1 = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()), dateutil2 = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()); if(!dateutil1.checkInputValidity() || !dateutil2.checkInputValidity()) { System.out.println("Wrong Format"); System.exit(0); } else { System.out.println("The days between " + dateutil1.showDate() + " and " + dateutil2.showDate() + " are:" + dateutil1.getDaysofDates(dateutil2)); } } else { System.out.println("Wrong Format"); System.exit(0); } } } class DateUtil { private Day day; private Month month; private Year year; private int[] mon_maxnum = {31,28,31,30,31,30,31,31,30,31,30,31}; public DateUtil(){ } public DateUtil(int y, int m, int d){ day = new Day(d); month = new Month(m); year = new Year(y); } public Year getYear(){ return year; } public void setYear(Year year) { this.year = year; } public Month getMonth() { return month; } public void setMonth(Month month) { this.month = month; } public Day getDay() { return day; } public void setDay(Day day) { this.day = day; } public void setDayMin() { day.setValue(1); } public void setDayMax() { day.setValue(mon_maxnum[month.getValue() - 1]); } public boolean checkInputValidity() { if(!year.validate()) { return false; } if(!month.validate()) { return false; } if(day.getValue() < 1 || day.getValue() > mon_maxnum[month.getValue() - 1]) { return false; } return true; } public boolean compareDates(DateUtil date) { if(year.getValue() > date.year.getValue()) { return true; } else { if(month.getValue() > date.month.getValue()){ return true; } else { if(day.getValue() > date.day.getValue()){ return true; } } } return false; } public boolean equalTwoDates(DateUtil date){ if(day.getValue() == date.day.getValue()) { if(month.getValue() == date.month.getValue()) { if(year.getValue() == date.year.getValue()) { return true; } } } return false; } public String showDate() { return String.valueOf(year.getValue()) + "-" + String.valueOf(month.getValue()) + "-" + String.valueOf(day.getValue()); } public DateUtil getNextNDays(int n) { int model; DateUtil day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.year.yearIncrement(); if((year.isLeapYear() == true && month.getValue() <= 2) || (day1.year.isLeapYear() == true && day1.month.getValue() >= 3)) model=366; else model=365; while(n>=model){ year.yearIncrement(); n=n-model; day1.year.yearIncrement(); if((year.isLeapYear() == true && month.getValue() <= 2) || (day1.year.isLeapYear() == true && day1.month.getValue() >= 3)) model=366; else model=365; } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); if(month.getValue() == 2 && year.isLeapYear() == true) { model=29; } else { model=day1.day.getValue(); } while(n>=model) { if(month.getValue() == 12) { year.yearIncrement(); month.resetMin(); } else { month.monthIncrement();; } n = n - model; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); if(month.getValue() == 2 && year.isLeapYear() == true) { model = 29; } else { model = day1.day.getValue(); } } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); while(n>=1) { if(month.getValue() == 2 && year.isLeapYear() == false && day.getValue() == 29) { month.monthIncrement(); day.setValue(2); } else if(month.getValue() == 2 && year.isLeapYear()== true && day.getValue() == 28) { day.setValue(29); } else if(month.getValue() == 12 && day.getValue() == 31) { year.yearIncrement(); month.resetMin(); this.setDayMin();; } else if(day.getValue() >= day1.day.getValue()) { month.monthIncrement(); day.setValue(day.getValue() + 1 - day1.day.getValue()); } else { day.dayIncrement(); } n=n-1; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); } if(month.getValue() == 2 && year.isLeapYear() == false && day.getValue() == 29) { month.monthIncrement(); this.setDayMin();; } return this ; } public DateUtil getPreviousNDays(int n) { int model ; DateUtil day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.year.yearReduction(); if((month.getValue() <= 3 && day1.year.isLeapYear()) || (month.getValue() >= 3 && year.isLeapYear() && n >= 366)) model = 366 ; else model = 365 ; while( n >= model) { year.yearReduction(); n = n - model; day1.year.yearReduction(); if((month.getValue() <= 3 && day1.year.isLeapYear()) || (month.getValue() >= 3 && year.isLeapYear() && n >= 366)) model = 366 ; else model = 365 ; } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); if(month.getValue() == 3 && year.isLeapYear() == true) { model = 29; } else { model = day1.day.getValue(); } while(n>=model) { if(month.getValue() == 1) { year.yearReduction(); month.resetMax(); } else { month.monthReduction(); } n=n-model; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); if(month.getValue() == 3 && year.isLeapYear() == true) { model = 29; } else { model = day1.day.getValue(); } } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); while(n>=1) { if(month.getValue() == 3 && year.isLeapYear() == true && day.getValue() == 1) { month.monthReduction();; day.setValue(29); } if(month.getValue() == 1 && day.getValue() == 1) { year.yearReduction(); month.resetMax(); this.setDayMax(); } if(day.getValue() == 1) { month.monthReduction(); this.setDayMax(); } else { day.dayReduction(); } n=n-1; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); } return this; } public int getDaysofDates(DateUtil day) { DateUtil day1, day2, day3; int model, num = 0; if(this.equalTwoDates(day) == true) { return 0; } else { if(this.compareDates(day) == true) { day1 = day; day2 = this; } else { day1 = this; day2 = day; } } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.year.yearIncrement(); while(day2.year.getValue() - day1.year.getValue() >= 2 || (day2.year.getValue() - day1.year.getValue() == 1 && (day1.month.getValue() < day2.month.getValue() || (day1.month.getValue() == day2.month.getValue() && day1.day.getValue() <= day2.day.getValue())))) { if((day1.year.isLeapYear() == true && (day1.month.getValue() <= 2)) || (day3.year.isLeapYear() == true && day1.month.getValue() >= 3)) { model=366; } else { model=365; } day1.year.yearIncrement(); num=num+model; day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.year.yearIncrement(); } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax(); while((day2.year.getValue() - day1.year.getValue() == 1 && (day2.month.getValue() >= 2 || (day2.month.getValue() == 1 && (day1.month.getValue() <= 11 || (day2.month.getValue() == 12 && day1.day.getValue() <= day2.day.getValue())))))||(day2.month.getValue() - day1.month.getValue() >= 2 || (day2.month.getValue() - day1.month.getValue() == 1 && (day1.month.getValue() <= day2.month.getValue())))) { if(day1.month.getValue() == 2 && day1.year.isLeapYear() == true) { model = 29; } else { model = day3.day.getValue(); } if(day1.month.getValue() == 12) { day1.year.yearIncrement(); day1.month.resetMin(); } else { day1.month.monthIncrement();; } num=num+model; day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax(); } if(day1.month.getValue() == 2 && day1.year.isLeapYear() == true && day1.day.getValue() >= 30) { day1.month.monthIncrement(); day1.day.setValue(day1.day.getValue() - 29); } else if(day1.year.isLeapYear() == false && day1.day.getValue() > day3.day.getValue()) { day1.day.setValue(day1.day.getValue() - day3.day.getValue()); day1.month.monthIncrement(); } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax(); while(day2.year.getValue() > day1.year.getValue() || day2.month.getValue() - day1.month.getValue() == 1 || day1.day.getValue() < day2.day.getValue()) { if(day1.month.getValue() == 2 && day1.year.isLeapYear() == false && day1.day.getValue() == 29) { day1.month.monthIncrement(); day1.day.setValue(2); } else if(day1.month.getValue() == 2 && day1.year.isLeapYear() == true && day1.day.getValue() == 28) { day1.day.setValue(29); } else if(day1.month.getValue() == 12 && day1.day.getValue() == 31) { day1.year.yearIncrement(); day1.month.resetMin(); day1.setDayMin(); } else if(day1.day.getValue() >= day3.day.getValue()) { day1.month.monthIncrement(); day1.day.setValue(1); } else { day1.day.dayIncrement(); } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax();; num=num+1; } return num; } } class Day { private int value; public Day() { } public Day(int dayValue) { this.setValue(dayValue); } public int getValue() { return value; } public void setValue(int value) { this.value = value; } public void dayIncrement() { this.value = this.value + 1; } public void dayReduction() { this.value = this.value - 1; } } class Month { private int value; public Month() { } public Month(int monthValue) { this.setValue(monthValue); } public int getValue() { return value; } public void setValue(int value) { this.value = value; } public void resetMin() { this.value = 1; } public void resetMax() { this.value = 12; } public boolean validate() { if(value < 1 || value > 12) { return false; } else { return true; } } public void monthIncrement() { this.value = this.value + 1; } public void monthReduction() { this.value = this.value - 1; } } class Year { private int value; public Year() { } public Year(int value) { this.value = value; } public int getValue() { return value; } public void setValue(int value) { this.value = value; } public boolean isLeapYear() { if(value % 100 == 0 && value % 400 == 0) return true; else if(value % 100 != 0 && value % 4 == 0) return true; else return false; } public boolean validate() { if(value < 1820 || value > 2020) { return false; } return true; } public void yearIncrement() { this.value = this.value + 1; } public void yearReduction() { this.value = this.value - 1; } }
再者是Source Monitor生成的图：
这里主要放DateUtil的了，毕竟别的类都大同小异。
由以上数据可以得知，我在其中用了过多的if等判断语句，导致平均复杂度过高。
在做题过程中，发现用多种类写出的代码确实是更加容易看懂和修改的。
关于题目集5的T7-6：
它也是日期类的迭代，只不过其中的类选择了让一个DateUtil类作为中间的控制类聚合其他除了主类的所有类。
源码如下：
import java.util.Scanner; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); int i = input.nextInt(); if(i == 1) { DateUtil dateutil = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()); i = input.nextInt(); if(!dateutil.checkInputValidity() || i < 0) { System.out.println("Wrong Format"); System.exit(0); } else { System.out.print(dateutil.showDate() + " next " + i + " days is:"); dateutil.getNextNDays(i); System.out.println(dateutil.showDate()); } } else if(i == 2) { DateUtil dateutil = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()); i = input.nextInt(); if(!dateutil.checkInputValidity() || i < 0) { System.out.println("Wrong Format"); System.exit(0); } else { System.out.print(dateutil.showDate() + " previous " + i + " days is:"); dateutil.getPreviousNDays(i); System.out.println(dateutil.showDate()); } } else if(i == 3) { DateUtil dateutil1 = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()), dateutil2 = new DateUtil(input.nextInt(), input.nextInt(), input.nextInt()); if(!dateutil1.checkInputValidity() || !dateutil2.checkInputValidity()) { System.out.println("Wrong Format"); System.exit(0); } else { System.out.println("The days between " + dateutil1.showDate() + " and " + dateutil2.showDate() + " are:" + dateutil1.getDaysofDates(dateutil2)); } } else { System.out.println("Wrong Format"); System.exit(0); } } } class DateUtil { private Day day; private Month month; private Year year; private int[] mon_maxnum = {31,28,31,30,31,30,31,31,30,31,30,31}; public DateUtil(){ } public DateUtil(int y, int m, int d){ day = new Day(d); month = new Month(m); year = new Year(y); } public Year getYear(){ return year; } public void setYear(Year year) { this.year = year; } public Month getMonth() { return month; } public void setMonth(Month month) { this.month = month; } public Day getDay() { return day; } public void setDay(Day day) { this.day = day; } public void setDayMin() { day.setValue(1); } public void setDayMax() { day.setValue(mon_maxnum[month.getValue() - 1]); } public boolean checkInputValidity() { if(!year.validate()) { return false; } if(!month.validate()) { return false; } if(year.isLeapYear() && month.getValue() == 2) if(day.getValue() < 1 || day.getValue() > 29) { return false; } else { if(day.getValue() < 1 || day.getValue() > mon_maxnum[month.getValue() - 1]) { return false; } } return true; } public boolean compareDates(DateUtil date) { if(year.getValue() > date.year.getValue()) { return true; } else { if(month.getValue() > date.month.getValue()){ return true; } else { if(day.getValue() > date.day.getValue()){ return true; } } } return false; } public boolean equalTwoDates(DateUtil date){ if(day.getValue() == date.day.getValue()) { if(month.getValue() == date.month.getValue()) { if(year.getValue() == date.year.getValue()) { return true; } } } return false; } public String showDate() { return String.valueOf(year.getValue()) + "-" + String.valueOf(month.getValue()) + "-" + String.valueOf(day.getValue()); } public DateUtil getNextNDays(int n) { int model; DateUtil day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.year.yearIncrement(); if((year.isLeapYear() == true && month.getValue() <= 2) || (day1.year.isLeapYear() == true && day1.month.getValue() >= 3)) model=366; else model=365; while(n>=model){ year.yearIncrement(); n=n-model; day1.year.yearIncrement(); if((year.isLeapYear() == true && month.getValue() <= 2) || (day1.year.isLeapYear() == true && day1.month.getValue() >= 3)) model=366; else model=365; } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); if(month.getValue() == 2 && year.isLeapYear() == true) { model=29; } else { model=day1.day.getValue(); } while(n>=model) { if(month.getValue() == 12) { year.yearIncrement(); month.resetMin(); } else { month.monthIncrement();; } n = n - model; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); if(month.getValue() == 2 && year.isLeapYear() == true) { model = 29; } else { model = day1.day.getValue(); } } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); while(n>=1) { if(month.getValue() == 2 && year.isLeapYear() == false && day.getValue() == 29) { month.monthIncrement(); day.setValue(2); } else if(month.getValue() == 2 && year.isLeapYear()== true && day.getValue() == 28) { day.setValue(29); } else if(month.getValue() == 12 && day.getValue() == 31) { year.yearIncrement(); month.resetMin(); this.setDayMin();; } else if(day.getValue() >= day1.day.getValue()) { month.monthIncrement(); day.setValue(day.getValue() + 1 - day1.day.getValue()); } else { day.dayIncrement(); } n=n-1; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.setDayMax(); } if(month.getValue() == 2 && year.isLeapYear() == false && day.getValue() == 29) { month.monthIncrement(); this.setDayMin();; } return this ; } public DateUtil getPreviousNDays(int n) { int model ; DateUtil day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.year.yearReduction(); if((month.getValue() <= 3 && day1.year.isLeapYear()) || (month.getValue() >= 3 && year.isLeapYear() && n >= 366)) model = 366 ; else model = 365 ; while( n >= model) { year.yearReduction(); n = n - model; day1.year.yearReduction(); if((month.getValue() <= 3 && day1.year.isLeapYear()) || (month.getValue() >= 3 && year.isLeapYear() && n >= 366)) model = 366 ; else model = 365 ; } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); if(month.getValue() == 3 && year.isLeapYear() == true) { model = 29; } else { model = day1.day.getValue(); } while(n>=model) { if(month.getValue() == 1) { year.yearReduction(); month.resetMax(); } else { month.monthReduction(); } n=n-model; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); if(month.getValue() == 3 && year.isLeapYear() == true) { model = 29; } else { model = day1.day.getValue(); } } day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); while(n>=1) { if(month.getValue() == 3 && year.isLeapYear() == true && day.getValue() == 1) { month.monthReduction();; day.setValue(29); } if(month.getValue() == 1 && day.getValue() == 1) { year.yearReduction(); month.resetMax(); this.setDayMax(); } if(day.getValue() == 1) { month.monthReduction(); this.setDayMax(); } else { day.dayReduction(); } n=n-1; day1 = new DateUtil(year.getValue(), month.getValue(), day.getValue()); day1.month.monthReduction(); if(day1.month.getValue() == 0) { day1.year.yearReduction(); day1.month.resetMax(); } day1.setDayMax(); } return this; } public int getDaysofDates(DateUtil day) { DateUtil day1, day2, day3; int model, num = 0; if(this.equalTwoDates(day) == true) { return 0; } else { if(this.compareDates(day) == true) { day1 = day; day2 = this; } else { day1 = this; day2 = day; } } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.year.yearIncrement(); while(day2.year.getValue() - day1.year.getValue() >= 2 || (day2.year.getValue() - day1.year.getValue() == 1 && (day1.month.getValue() < day2.month.getValue() || (day1.month.getValue() == day2.month.getValue() && day1.day.getValue() <= day2.day.getValue())))) { if((day1.year.isLeapYear() == true && (day1.month.getValue() <= 2)) || (day3.year.isLeapYear() == true && day1.month.getValue() >= 3)) { model=366; } else { model=365; } day1.year.yearIncrement(); num=num+model; day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.year.yearIncrement(); } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax(); while((day2.year.getValue() - day1.year.getValue() == 1 && (day2.month.getValue() >= 2 || (day2.month.getValue() == 1 && (day1.month.getValue() <= 11 || (day2.month.getValue() == 12 && day1.day.getValue() <= day2.day.getValue())))))||(day2.month.getValue() - day1.month.getValue() >= 2 || (day2.month.getValue() - day1.month.getValue() == 1 && (day1.month.getValue() <= day2.month.getValue())))) { if(day1.month.getValue() == 2 && day1.year.isLeapYear() == true) { model = 29; } else { model = day3.day.getValue(); } if(day1.month.getValue() == 12) { day1.year.yearIncrement(); day1.month.resetMin(); } else { day1.month.monthIncrement();; } num=num+model; day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax(); } if(day1.month.getValue() == 2 && day1.year.isLeapYear() == true && day1.day.getValue() >= 30) { day1.month.monthIncrement(); day1.day.setValue(day1.day.getValue() - 29); } else if(day1.year.isLeapYear() == false && day1.day.getValue() > day3.day.getValue()) { day1.day.setValue(day1.day.getValue() - day3.day.getValue()); day1.month.monthIncrement(); } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax(); while(day2.year.getValue() > day1.year.getValue() || day2.month.getValue() - day1.month.getValue() == 1 || day1.day.getValue() < day2.day.getValue()) { if(day1.month.getValue() == 2 && day1.year.isLeapYear() == false && day1.day.getValue() == 29) { day1.month.monthIncrement(); day1.day.setValue(2); } else if(day1.month.getValue() == 2 && day1.year.isLeapYear() == true && day1.day.getValue() == 28) { day1.day.setValue(29); } else if(day1.month.getValue() == 12 && day1.day.getValue() == 31) { day1.year.yearIncrement(); day1.month.resetMin(); day1.setDayMin(); } else if(day1.day.getValue() >= day3.day.getValue()) { day1.month.monthIncrement(); day1.day.setValue(1); } else { day1.day.dayIncrement(); } day3 = new DateUtil(day1.year.getValue(), day1.month.getValue(), day1.day.getValue()); day3.setDayMax();; num=num+1; } return num; } } class Day { private int value; public Day() { } public Day(int dayValue) { this.setValue(dayValue); } public int getValue() { return value; } public void setValue(int value) { this.value = value; } public void dayIncrement() { this.value = this.value + 1; } public void dayReduction() { this.value = this.value - 1; } } class Month { private int value; public Month() { } public Month(int monthValue) { this.setValue(monthValue); } public int getValue() { return value; } public void setValue(int value) { this.value = value; } public void resetMin() { this.value = 1; } public void resetMax() { this.value = 12; } public boolean validate() { if(value < 1 || value > 12) { return false; } else { return true; } } public void monthIncrement() { this.value = this.value + 1; } public void monthReduction() { this.value = this.value - 1; } } class Year { private int value; public Year() { } public Year(int value) { this.value = value; } public int getValue() { return value; } public void setValue(int value) { this.value = value; } public boolean isLeapYear() { if(value % 100 == 0 && value % 400 == 0) return true; else if(value % 100 != 0 && value % 4 == 0) return true; else return false; } public boolean validate() { if(value < 1820 || value > 2020) { return false; } return true; } public void yearIncrement() { this.value = this.value + 1; } public void yearReduction() { this.value = this.value - 1; } }
还有Source Monitor生成的图，依旧是只放DateUtil类的
可以看出这次的DateUtil类比上道题的类更加复杂了，可见这复杂度与与之相关的类的数量是有必然关系的。
这两道题向我展示了同一种题以不同形式类群解决的可能性。
关于题目集6的T7-1
题目：
设计点菜计价程序，根据输入的信息，计算并输出总价格。
输入内容按先后顺序包括两部分：菜单、订单，最后以"end"结束。
菜单由一条或多条菜品记录组成，每条记录一行
每条菜品记录包含：菜名、基础价格 两个信息。
订单分：桌号标识、点菜记录和删除信息、代点菜信息。每一类信息都可包含一条或多条记录，每条记录一行或多行。
桌号标识独占一行，包含两个信息：桌号、时间。
桌号以下的所有记录都是本桌的记录，直至下一个桌号标识。
点菜记录包含：序号、菜名、份额、份数。份额可选项包括：1、2、3，分别代表小、中、大份。
不同份额菜价的计算方法：小份菜的价格=菜品的基础价格。中份菜的价格=菜品的基础价格1.5。小份菜的价格=菜品的基础价格2。如果计算出现小数，按四舍五入的规则进行处理。
删除记录格式：序号 delete
标识删除对应序号的那条点菜记录。
如果序号不对，输出"delete error"
代点菜信息包含：桌号 序号 菜品名称 份额 分数
代点菜是当前桌为另外一桌点菜，信息中的桌号是另一桌的桌号，带点菜的价格计算在当前这一桌。
程序最后按输入的桌号从小到大的顺序依次输出每一桌的总价（注意：由于有代点菜的功能，总价不一定等于当前桌上的菜的价格之和）。
每桌的总价等于那一桌所有菜的价格之和乘以折扣。如存在小数，按四舍五入规则计算，保留整数。
折扣的计算方法（注：以下时间段均按闭区间计算）：
周一至周五营业时间与折扣：晚上（17：00-20：30）8折，周一至周五中午（10:30--14:30）6折，其余时间不营业。
周末全价，营业时间：9:30-21:30
如果下单时间不在营业范围内，输出"table " + t.tableNum + " out of opening hours"
参考以下类的模板进行设计（本内容与计价程序之前相同，其他类根据需要自行定义）：
菜品类：对应菜谱上一道菜的信息。
Dish {
String name;//菜品名称
int unit_price; //单价
int getPrice(int portion)//计算菜品价格的方法，输入参数是点菜的份额（输入数据只能是1/2/3，代表小/中/大份） }
菜谱类：对应菜谱，包含饭店提供的所有菜的信息。
Menu {
Dish[] dishs ;//菜品数组，保存所有菜品信息
Dish searthDish(String dishName)//根据菜名在菜谱中查找菜品信息，返回Dish对象。
Dish addDish(String dishName,int unit_price)//添加一道菜品信息
}
点菜记录类：保存订单上的一道菜品记录
Record {
int orderNum;//序号
Dish d;//菜品\\
int portion;//份额（1/2/3代表小/中/大份）
int getPrice()//计价，计算本条记录的价格
}
订单类：保存用户点的所有菜的信息。
Order {
Record[] records；//保存订单上每一道的记录
int getTotalPrice()//计算订单的总价
Record addARecord(int orderNum,String dishName,int portion,int num)//添加一条菜品信息到订单中。
delARecordByOrderNum(int orderNum)//根据序号删除一条记录
findRecordByNum(int orderNum)//根据序号查找一条记录
}
本次课题比菜单计价系列-3增加的异常情况：
1、菜谱信息与订单信息混合，应忽略夹在订单信息中的菜谱信息。输出："invalid dish"
2、桌号所带时间格式合法（格式见输入格式部分说明，其中年必须是4位数字，月、日、时、分、秒可以是1位或2位数），数据非法，比如：2023/15/16 ，输出桌号＋" date error"
3、同一桌菜名、份额相同的点菜记录要合并成一条进行计算，否则可能会出现四舍五入的误差。
4、重复删除，重复的删除记录输出"deduplication :"+序号。
5、代点菜时，桌号不存在，输出"Table number ："+被点菜桌号+" does not exist"；本次作业不考虑两桌记录时间不匹配的情况。
6、菜谱信息中出现重复的菜品名，以最后一条记录为准。
7、如果有重复的桌号信息，如果两条信息的时间不在同一时间段，（时段的认定：周一到周五的中午或晚上是同一时段，或者周末时间间隔1小时（不含一小时整，精确到秒）以内算统一时段），此时输出结果按不同的记录分别计价。
8、重复的桌号信息如果两条信息的时间在同一时间段，此时输出结果时合并点菜记录统一计价。前提：两个的桌号信息的时间都在有效时间段以内。计算每一桌总价要先合并符合本条件的饭桌的点菜记录，统一计价输出。
9、份额超出范围（1、2、3）输出：序号+" portion out of range "+份额，份额不能超过1位，否则为非法格式，参照第13条输出。
10、份数超出范围，每桌不超过15份，超出范围输出：序号+" num out of range "+份数。份数必须为数值，最高位不能为0，否则按非法格式参照第16条输出。
11、桌号超出范围[1,55]。输出：桌号 +" table num out of range"，桌号必须为1位或多位数值，最高位不能为0，否则按非法格式参照第16条输出。
12、菜谱信息中菜价超出范围（区间（0,300）），输出：菜品名+" price out of range "+价格，菜价必须为数值，最高位不能为0，否则按非法格式参照第16条输出。
13、时间输入有效但超出范围[2022.1.1-2023.12.31]，输出："not a valid time period"
14、一条点菜记录中若格式正确，但数据出现问题，如：菜名不存在、份额超出范围、份数超出范围，按记录中从左到右的次序优先级由高到低，输出时只提示优先级最高的那个错误。
15、每桌的点菜记录的序号必须按从小到大的顺序排列（可以不连续，也可以不从1开始），未按序排列序号的输出："record serial number sequence error"。当前记录忽略。（代点菜信息的序号除外）
16、所有记录其它非法格式输入，统一输出"wrong format"
17、如果记录以“table”开头，对应记录的格式或者数据不符合桌号的要求，那一桌下面定义的所有信息无论正确或错误均忽略，不做处理。如果记录不是以“table”开头，比如“tab le 55 2023/3/2 12/00/00”，该条记录认为是错误记录，后面所有的信息并入上一桌一起计算。
本次作业比菜单计价系列-3增加的功能：
菜单输入时增加特色菜，特色菜的输入格式：菜品名+英文空格+基础价格+"T"
例如：麻婆豆腐 9 T
菜价的计算方法：
周一至周五 7折， 周末全价。
注意：不同的四舍五入顺序可能会造成误差，请按以下步骤累计一桌菜的菜价：
计算每条记录的菜价：将每份菜的单价按份额进行四舍五入运算后，乘以份数计算多份的价格，然后乘以折扣，再进行四舍五入，得到本条记录的最终支付价格。
最后将所有记录的菜价累加得到整桌菜的价格。
输入格式:
桌号标识格式：table + 序号 +英文空格+ 日期（格式：YYYY/MM/DD）+英文空格+ 时间（24小时制格式： HH/MM/SS）
菜品记录格式：
菜名+英文空格+基础价格
如果有多条相同的菜名的记录，菜品的基础价格以最后一条记录为准。
点菜记录格式：序号+英文空格+菜名+英文空格+份额+英文空格+份数注：份额可输入（1/2/3）， 1代表小份，2代表中份，3代表大份。
删除记录格式：序号 +英文空格+delete
代点菜信息包含：桌号+英文空格+序号+英文空格+菜品名称+英文空格+份额+英文空格+分数
最后一条记录以“end”结束。
输出格式:
按输入顺序输出每一桌的订单记录处理信息，包括：
1、桌号，格式：table+英文空格+桌号+”:”
2、按顺序输出当前这一桌每条订单记录的处理信息，
每条点菜记录输出：序号+英文空格+菜名+英文空格+价格。其中的价格等于对应记录的菜品*份数，序号是之前输入的订单记录的序号。如果订单中包含不能识别的菜名，则输出“** does not exist”，**是不能识别的菜名
如果删除记录的序号不存在，则输出“delete error”
最后按输入顺序一次输出每一桌所有菜品的总价（整数数值）格式：table+英文空格+桌号+“:”+英文空格+当前桌的原始总价+英文空格+当前桌的计算折扣后总价
我并没有写到满分，除去自己懒的因素，从效率上来看，也是有大问题的，之后再聊。
关于源码：
import java.util.Scanner; import java.util.Calendar; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); Menu menu = new Menu(); Record record = new Record(); Order order = new Order(); Table[] table = new Table[100]; Calendar calendar = Calendar.getInstance(); int[] max_day = {31,28,31,30,31,30,31,31,30,31,30,31}; String line = input.nextLine(); String[] information = line.split(" "); int tabletimes = -1, recordtimes, n = 0; while(!information[0].equals("table")) { n = 0; if(menu.checkPrice(information[0], information[1])) { menu.addDishtimes(); menu.addDish(information[0], Integer.parseInt(information[1])); n = 1; } if(information.length == 3 && n == 1) { menu.getDishs()[menu.getDishtimes()].setT(1); } line = input.nextLine(); information = line.split(" "); } while(true) { if(information[0].equals("table")) { if(information.length >= 5) { System.out.println("wrong format"); break; } recordtimes = 0; tabletimes ++; table[tabletimes] = new Table(); String[] date1 = information[2].split("/"); String[] date2 = information[3].split("/"); if(date1[0].length() != 4 || date1[1].length() > 2 || date1[2].length() > 2 || date2[0].length() > 2 || date2[1].length() > 2 || date2[2].length() > 2 ) { System.out.println("wrong format"); break; } for(n = 0; n <= tabletimes - 1; n++) { if(Integer.parseInt(information[1]) == table[n].getNum() && (Integer.parseInt(date1[0]) == (table[n].getCalendar().get(Calendar.YEAR))) && (Integer.parseInt(date1[1]) == (table[n].getCalendar().get(Calendar.MONTH))) && (Integer.parseInt(date1[2]) == (table[n].getCalendar().get(Calendar.DATE)))) { if(table[n].getCalendar().get(Calendar.DAY_OF_WEEK) == 6 || table[n].getCalendar().get(Calendar.DAY_OF_WEEK) == 7) { if((Integer.parseInt(date2[0]) == (table[n].getCalendar().get(Calendar.HOUR_OF_DAY))) || ((Integer.parseInt(date2[0]) - (table[n].getCalendar().get(Calendar.HOUR_OF_DAY)) == 1) && ((Integer.parseInt(date2[1]) - (table[n].getCalendar().get(Calendar.MINUTE)) > 0) || (Integer.parseInt(date2[1]) - (table[n].getCalendar().get(Calendar.MINUTE)) == 0) && (Integer.parseInt(date2[2]) - (table[n].getCalendar().get(Calendar.SECOND)) > 0))) || ((table[n].getCalendar().get(Calendar.HOUR_OF_DAY) - (Integer.parseInt(date2[0])) == 1) && ((table[n].getCalendar().get(Calendar.MINUTE)) - Integer.parseInt(date2[1]) > 0) || (table[n].getCalendar().get(Calendar.MINUTE) - Integer.parseInt(date2[1]) == 0 && Integer.parseInt(date2[2]) - (table[n].getCalendar().get(Calendar.SECOND)) > 0))) { tabletimes --; } } if(table[n].getCalendar().get(Calendar.DAY_OF_WEEK) <= 5 || table[n].getCalendar().get(Calendar.DAY_OF_WEEK) >= 1) { if((table[n].getCalendar().get(Calendar.HOUR) == 10 && table[n].getCalendar().get(Calendar.MINUTE) >= 30) || (table[n].getCalendar().get(Calendar.HOUR) >= 11 && table[n].getCalendar().get(Calendar.HOUR) <= 13) || (table[n].getCalendar().get(Calendar.HOUR) == 14 && table[n].getCalendar().get(Calendar.MINUTE) <= 30)) { if((Integer.parseInt(date2[0]) == 10 && Integer.parseInt(date2[1]) >= 30) || (Integer.parseInt(date2[0]) >= 11 && Integer.parseInt(date2[0]) <= 13) || (Integer.parseInt(date2[0]) == 14 && Integer.parseInt(date2[1]) <= 30)){ tabletimes --; } } else if((table[n].getCalendar().get(Calendar.HOUR) >= 17 && table[n].getCalendar().get(Calendar.HOUR) <= 19) || (table[n].getCalendar().get(Calendar.HOUR) == 20 && table[n].getCalendar().get(Calendar.MINUTE) <= 30)) { if((Integer.parseInt(date2[0]) >= 17 && Integer.parseInt(date2[0]) <= 19) || (Integer.parseInt(date2[0]) == 20 && Integer.parseInt(date2[1]) <= 30)) tabletimes --; } } } } if(information[1].charAt(0) == 0) { System.out.println("wrong format"); break; } else if(!information[1].replace("-", "").matches("^[0-9]+$")) { System.out.println("wrong format"); break; } else if(Integer.parseInt(information[1]) < 1 || Integer.parseInt(information[1]) > 55) { System.out.println(Integer.parseInt(information[1]) + " table num out of range"); break; } else if(Integer.parseInt(information[1]) >= 1 || Integer.parseInt(information[1]) <= 55){ table[tabletimes].setNum(Integer.parseInt(information[1])); if(date1[0].length() != 4 || Integer.parseInt(date1[1]) < 1 || (Integer.parseInt(date1[1]) > 12) || (Integer.parseInt(date1[2]) < 0 || Integer.parseInt(date1[2]) > max_day[Integer.parseInt(date1[1]) - 1])) { System.out.println(information[1] +" date error"); } else if((Integer.parseInt(date2[0]) < 0 || Integer.parseInt(date2[0]) > 23) || (Integer.parseInt(date2[1]) < 0 || (Integer.parseInt(date2[1]) > 59) || (Integer.parseInt(date2[2]) < 0 || Integer.parseInt(date2[2]) > 59))){ System.out.println(information[1] +" date error"); } else if((Integer.parseInt(date1[0]) < 2022 || Integer.parseInt(date1[0]) > 2023)) { System.out.println("not a valid time period"); } else { table[tabletimes].setCalendar(Integer.parseInt(date1[0]), Integer.parseInt(date1[1]), Integer.parseInt(date1[2]), Integer.parseInt(date2[0]), Integer.parseInt(date2[1]), Integer.parseInt(date2[2])); System.out.println("table " + table[tabletimes].getNum() + ":"); } } line = input.nextLine(); information = line.split(" "); while(!information[0].equals("table")) { if(information.length == 5 && information[0].replace("-", "").matches("^[0-9]+$")) { for(n = 0; n <= tabletimes - 1; n++) { if(Integer.valueOf(information[0]) == table[n].getNum()) { if(table[n].getOrder().checkNum(Integer.parseInt(information[1]))) { if(menu.checkName(information[2])) { record = new Record(Integer.parseInt(information[1]), menu.searchDish(information[2]), Integer.parseInt(information[3]), Integer.parseInt(information[4])); if(record.checkPortion()) { if(information[4].charAt(0) == 0) { System.out.println("wrong format"); } else if(record.checkNum()) { table[n].getOrder().addARecord(record.getOrderNum(), record.getD(), record.getPortion(), record.getNum()); table[n].getOrder().setRecordtimes(table[n].getOrder().getRecordtimes() + 1); } } } } } break; } } else if(information[1].equals("delete")) { if(table[tabletimes].getOrder().delARecordByOrderNum(Integer.parseInt(information[0])) == 1) { System.out.println("delete error"); } if(table[tabletimes].getOrder().delARecordByOrderNum(Integer.parseInt(information[0])) == 2) { System.out.println("deduplication " + Integer.parseInt(information[0])); } } else if(information.length == 2 || information.length == 3) { System.out.println("invalid dish"); } else if(information.length == 4 ){ if(table[tabletimes].getOrder().getRecordtimes() == 0) { if(menu.checkName(information[1])) { record = new Record(Integer.parseInt(information[0]), menu.searchDish(information[1]), Integer.parseInt(information[2]), Integer.parseInt(information[3])); if(record.checkPortion()) { if(information[3].charAt(0) == 0) { System.out.println("wrong format"); } else if(record.checkNum()) { System.out.println(record.getOrderNum() + " " + record.getD().getName() + " " + record.getPrice()); table[tabletimes].getOrder().addARecord(record.getOrderNum(), record.getD(), record.getPortion(), record.getNum()); recordtimes ++; table[tabletimes].getOrder().setRecordtimes(recordtimes); } } } } else { if(table[tabletimes].getOrder().checkNum(Integer.parseInt(information[0]))){ if(menu.checkName(information[1])) { record = new Record(Integer.parseInt(information[0]), menu.searchDish(information[1]), Integer.parseInt(information[2]), Integer.parseInt(information[3])); if(record.checkPortion()) { if(information[3].charAt(0) == 0) { System.out.println("wrong format"); } else if(record.checkNum()) { System.out.println(record.getOrderNum() + " " + record.getD().getName() + " " + record.getPrice()); table[tabletimes].getOrder().addARecord(record.getOrderNum(), record.getD(), record.getPortion(), record.getNum()); recordtimes ++; table[tabletimes].getOrder().setRecordtimes(recordtimes); } } } } } } else { System.out.println("wrong format"); } line = input.nextLine(); information = line.split(" "); if(information[0].equals("end")) { break; } } } if(information[0].equals("end")) { break; } } for(n = 0; n <= tabletimes; n++) { if(table[n].getNum() != 0) System.out.println("table " + table[n].getNum() + ": " + table[n].sum() + " " + table[n].sumAfter()); } } } class Menu { private Dish[] dishs = new Dish[100]; private int dishtimes = -1; public Menu() { super(); // TODO Auto-generated constructor stub } public Menu(Dish[] dishs) { super(); this.dishs = dishs; } public Dish[] getDishs() { return dishs; } public void setDishs(Dish[] dishs) { this.dishs = dishs; } public int getDishtimes() { return dishtimes; } public void setDishtimes(int dishtimes) { this.dishtimes = dishtimes; } public void addDishtimes() { this.dishtimes ++; } public Dish searchDish(String dishName) { int i; Dish wrong = new Dish("wrong",0); for(i = this.dishtimes; i >= 0; i--) { if(dishName.equals(dishs[i].getName())) { return dishs[i]; } } return wrong; } public Dish addDish(String dishName,int unit_price) { this.dishs[this.dishtimes] = new Dish(dishName, unit_price); return dishs[this.dishtimes]; } public boolean checkPrice(String dishname, String unit_price) { if(!unit_price.equalsIgnoreCase("0")) { if(unit_price.charAt(0) == 0) { System.out.println("wrong format"); return false; } } else { if(Integer.parseInt(unit_price) <= 0 || Integer.parseInt(unit_price) >= 300) { System.out.println(dishname + " price out of range " + unit_price); return false; } } return true; } public boolean checkName(String dishname) { int i = 0; for(;i <= dishs.length - 1; i ++) { if(dishs[i].getName().equals(dishname)) { return true; } } System.out.println(dishname + "does not exist"); return false; } } class Dish { private String name =""; private int unit_price; private int T; public Dish() { super(); // TODO Auto-generated constructor stub } public Dish(String name, int unit_price) { super(); this.name = name; this.unit_price = unit_price; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getUnit_price() { return unit_price; } public void setUnit_price(int unit_price) { this.unit_price = unit_price; } public int getT() { return T; } public void setT(int t) { T = t; } public int getPrice(int portion) { switch(portion) { case 1: return this.unit_price; case 2: { float price = this.unit_price * 1.5f ; return Math.round(price); } case 3: return this.unit_price * 2; } return 0; } } class Record { private int orderNum; private Dish d; private int portion; private int num; public Record() { super(); // TODO Auto-generated constructor stub } public Record(int orderNum, Dish d, int portion, int num) { super(); this.orderNum = orderNum; this.d = d; this.portion = portion; this.num = num; } public int getOrderNum() { return orderNum; } public void setOrderNum(int orderNum) { this.orderNum = orderNum; } public Dish getD() { return d; } public void setD(Dish d) { this.d = d; } public int getPortion() { return portion; } public void setPortion(int portion) { this.portion = portion; } public int getNum() { return num; } public void setNum(int num) { this.num = num; } public int getPrice() { return num * d.getPrice(portion); } public boolean checkPortion() { if(this.d.getT() == 0 && (portion >= 1 || portion <= 3)){ return true; } if(this.d.getT() == 1 && (portion == 1 || portion <= 3)){ return true; } if(this.d.getT() >= 10) { System.out.println("not a valid time period"); return false; } System.out.println(this.orderNum + " num out of range " + this.portion); return false; } public boolean checkNum() { if(this.num < 0 || this.num > 15) { System.out.println(this.orderNum + " portion out of range " + this.num); return false; } return true; } } class Order { private Record[] records = new Record[100]; private int recordtimes = 0; public Order() { super(); // TODO Auto-generated constructor stub } public Order(Record[] records, int recordtimes) { super(); this.records = records; this.recordtimes = recordtimes; } public Record[] getRecords() { return records; } public void setRecords(Record[] records) { this.records = records; } public int getRecordtimes() { return recordtimes; } public void setRecordtimes(int recordtimes) { this.recordtimes = recordtimes; } public int getTotalPrice() { int i, sum = 0; for(i = 0; i < records.length; i++) { sum = sum + records[i].getPrice(); } return sum; } public void addARecord(int orderNum, Dish dish, int portion,int num) { records[recordtimes] = new Record(orderNum, dish, portion, num); recordtimes ++; } public int delARecordByOrderNum(int orderNum) { int i; for(i = 0; i <= records.length - 1; i ++) { if(orderNum == records[i].getOrderNum()) { if(records[i].getNum() == 0) { return 2; } else { records[i].setNum(0); return 1; } } } return 3; } public Record RecordByNum(int orderNum) { int i; for(i = 0; i <= records.length - 1; i ++) { if(orderNum == records[i].getOrderNum()) { return records[i]; } } System.out.println("wrong format"); return new Record(); } public boolean checkNum(int orderNum) { int i; for(i = 0; i <= this.recordtimes - 1; i++) { if(orderNum <= this.records[i].getOrderNum()) { System.out.println("record serial number sequence error"); return false; } } return true; } } class Table { private int num; private Calendar calendar =Calendar.getInstance(); private Order order = new Order(); public Table() { // TODO Auto-generated constructor stub } public Table(int num, Calendar calendar, Order order) { super(); this.num = num; this.calendar = calendar; this.order = order; } public int getNum() { return num; } public void setNum(int num) { this.num = num; } public Calendar getCalendar() { return calendar; } public void setCalendar(int year, int month, int day, int hour, int minute, int second) { this.calendar.set(Calendar.YEAR, year); this.calendar.set(Calendar.MONTH, month); this.calendar.set(Calendar.DATE, day); this.calendar.set(Calendar.HOUR_OF_DAY, hour); this.calendar.set(Calendar.MINUTE, minute); this.calendar.set(Calendar.SECOND, second); } public Order getOrder() { return order; } public void setOrder(Order order) { this.order = order; } public boolean checkDate() { if(this.calendar.get(Calendar.DAY_OF_WEEK) >= 1 && this.calendar.get(Calendar.DAY_OF_WEEK) <= 5) { if((this.calendar.get(Calendar.HOUR) == 10 && this.calendar.get(Calendar.MINUTE) >= 30) || (this.calendar.get(Calendar.HOUR) >= 11 && this.calendar.get(Calendar.HOUR) <= 13) || (this.calendar.get(Calendar.HOUR) == 14 && this.calendar.get(Calendar.MINUTE) <= 30)) { return true; } else if((this.calendar.get(Calendar.HOUR) >= 17 && this.calendar.get(Calendar.HOUR) <= 19) || (this.calendar.get(Calendar.HOUR) == 20 && this.calendar.get(Calendar.MINUTE) <= 30)) { return true; } } else if(this.calendar.get(Calendar.DAY_OF_WEEK) >= 6 && this.calendar.get(Calendar.DAY_OF_WEEK) <= 7) { if((this.calendar.get(Calendar.HOUR) ==9 && this.calendar.get(Calendar.MINUTE) >= 30) && (this.calendar.get(Calendar.HOUR) >= 10 && this.calendar.get(Calendar.HOUR) <= 20) && (this.calendar.get(Calendar.HOUR) == 21 && this.calendar.get(Calendar.MINUTE) <= 30)) { return true; } } return false; } public int sum() { int i,sum = 0; for(i = 0; i <= this.order.getRecordtimes() - 1; i ++) { sum = sum +order.getRecords()[i].getPrice(); } return sum; } public int sumAfter() { int i,sum = 0; for(i = 0; i <= this.order.getRecordtimes() - 1; i ++) { if(this.order.getRecords()[i].getD().getT() == 0) { if(this.calendar.get(Calendar.DAY_OF_WEEK) >= 1 && this.calendar.get(Calendar.DAY_OF_WEEK) <= 5) { if((this.calendar.get(Calendar.HOUR) == 10 && this.calendar.get(Calendar.MINUTE) >= 30) || (this.calendar.get(Calendar.HOUR) >= 11 && this.calendar.get(Calendar.HOUR) <= 13) || (this.calendar.get(Calendar.HOUR) == 14 && this.calendar.get(Calendar.MINUTE) <= 30)) { float price = this.order.getRecords()[i].getPrice() * 0.6f ; sum = sum + Math.round(price); } else if((this.calendar.get(Calendar.HOUR) >= 17 && this.calendar.get(Calendar.HOUR) <= 19) || (this.calendar.get(Calendar.HOUR) == 20 && this.calendar.get(Calendar.MINUTE) <= 30)) { float price = this.order.getRecords()[i].getPrice() * 0.8f ; sum = sum + Math.round(price); } } else { sum = sum +order.getRecords()[i].getPrice(); } } else { if(this.calendar.get(Calendar.DAY_OF_WEEK) >= 1 && this.calendar.get(Calendar.DAY_OF_WEEK) <= 5) { float price = this.order.getRecords()[i].getPrice() * 0.7f ; sum = sum + Math.round(price); } else { sum = sum + order.getRecords()[i].getPrice(); } } } return sum; } }
再看类图：
自己在原题目的基础上加了一个table的类，但是感觉不太够，一大堆情况没考虑完全。总之就是很糟糕，上课讲的知识也没用到多少，下次绝对不这样了。
踩坑心得：
这几次作业日期类的由于是迭代所以没啥好说的，之前做对了这次也不会有大问题。
主要是点餐题
我只是搭了个框架，里面的内容也来不及细细填充，所以硬要说有坑的话，我是直接掉了下去，没什么心得的。
还是给个例子吧：
因为没考虑到菜全都不通过的情况，所以答案少了table的最终价格。
改进建议：
1，实在想不出就借鉴一下别人的方法，会了就行。
2，多用上老师上课讲的各种模式，多用。
3，争分夺秒写作业。
4，合理提高效率。
总结：
通过这三次作业我认识到了个人力量的有限，明白了有时为了完成任务借助他人力量的重要性。再者就是得努力完成自己分内的事，别荒废了时间。
希望老师保持现在的风格，再严一点也是没事的。