GUI编程Day03

dongfangyulv / 2024-09-26 / 原文

package com.dongfang.lesson04;

import javax.swing.*;
import java.awt.*;

//图标需要实现类
public class IconDemo extends JFrame implements Icon {

    private int width;
    private int height;

    public IconDemo(){}//无参构造
    public IconDemo(int width,int height){
        this.width = width;
        this.height = height;
    }

    public void init(){
        IconDemo iconDemo = new IconDemo(15, 15);
        //图标放在标签上，也可以放在按钮上
        JLabel label = new JLabel("icontest",iconDemo,SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new IconDemo().init();
    }

    @Override
    public void paintIcon(Component c,Graphics g,int x,int y){
        g.fillOval(x,y,width,height);
    }
    @Override
    public int getIconWidth(){
        return this.width;
    }
    @Override
    public int getIconHeight(){
        return this.height;
    }
}

图片Icon

package com.dongfang.lesson04;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class ImageIconDemo extends JFrame {
    public ImageIconDemo() throws HeadlessException {
        //获取图片的地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("tp.jpg");

        ImageIcon imageIcon = new ImageIcon(url);//命名不要冲突了
        label.setIcon(imageIcon);
        label.setHorizontalAlignment(SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(100,100,200,200);
    }

    public static void main(String[] args) {
        new ImageIconDemo();
    }
}

面板

JPanel

package com.dongfang.lesson05;

import javax.swing.*;
import java.awt.*;

public class JPanelDemo extends JFrame {
    public JPanelDemo() {
        Container container = this.getContentPane();

        container.setLayout(new GridLayout(2,1,10,10));//行列  间距

        JPanel panel1 = new JPanel(new GridLayout(1,3));
        JPanel panel2 = new JPanel(new GridLayout(1,2));
        JPanel panel3 = new JPanel(new GridLayout(2,1));
        JPanel panel4 = new JPanel(new GridLayout(3,2));

        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel2.add(new JButton("2"));
        panel2.add(new JButton("2"));
        panel3.add(new JButton("3"));
        panel3.add(new JButton("3"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));

        container.add(panel1);
        container.add(panel2);
        container.add(panel3);
        container.add(panel4);

        this.setVisible(true);
        this.setSize(500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JPanelDemo();
    }
}

![截图](C:\Users\34454\Pictures\Screenshots\屏幕截图 2024-09-24 185704.png)

JScrollPanel

package com.dongfang.lesson05;

import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {
    public JScrollDemo(){
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20, 50);
        textArea.setText("文本域");

        //Scroll面板  滚动条
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo();
    }
}

按钮

普通按钮（图片按钮）

package com.dongfang.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo01 extends JFrame {

    public JButtonDemo01(){
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo01.class.getResource("tp.jpg");
        Icon icon = new ImageIcon(resource);

        //把这个图标放在按钮上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("图片按钮");

        //add
        container.add(button);
        
        this.setVisible(true);
        this.setBounds(100,100,500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JButtonDemo01();
    }
}

单选按钮

package com.dongfang.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo02 extends JFrame {

    public JButtonDemo02(){
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo02.class.getResource("tp.jpg");
        Icon icon = new ImageIcon(resource);

        //单选框  RadioButton
        JRadioButton radioButton1 = new JRadioButton("JRadioButton1");
        JRadioButton radioButton2 = new JRadioButton("JRadioButton2");
        JRadioButton radioButton3 = new JRadioButton("JRadioButton3");

        //由于单选框只能选择一个  分组  同一组只能选一个
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton1);
        group.add(radioButton2);
        group.add(radioButton3);

        container.add(radioButton1,BorderLayout.CENTER);
        container.add(radioButton2,BorderLayout.NORTH);
        container.add(radioButton3,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setBounds(100,100,500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JButtonDemo02();
    }
}

复选按钮

package com.dongfang.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo03 extends JFrame {

    public JButtonDemo03(){
        Container container = this.getContentPane();
        //将一个图片变为图标
        URL resource = JButtonDemo03.class.getResource("tp.jpg");
        Icon icon = new ImageIcon(resource);

        //多选框  CheckBox
        JCheckBox checkBox01 = new JCheckBox("checkBox01");
        JCheckBox checkBox02 = new JCheckBox("checkBox02");

        container.add(checkBox01,BorderLayout.NORTH);
        container.add(checkBox02,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setBounds(100,100,500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo03();
    }
}

列表

下拉框

package com.dongfang.lesson06;

import javax.swing.*;
import java.awt.*;

public class TestComboboxDemo01 extends JFrame {
    public TestComboboxDemo01(){

        Container container = this.getContentPane();
        JComboBox status = new JComboBox();

        status.addItem(null);
        status.addItem("正在热映");
        status.addItem("已下架");
        status.addItem("即将上映");
        
        container.add(status);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo01();
    }
}

列表框

package com.dongfang.lesson06;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02(){

        Container container = this.getContentPane();

        //生成列表的内容  稀疏数组
        //String[] contents = {"1","2","3"};

        Vector contents = new Vector();
        //列表中需要放内容
        JList list = new JList(contents);

        contents.add("1");
        contents.add("2");
        contents.add("3");

        container.add(list);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}

应用场景
- 选择地区，或者一些单个选项
- 列表，展示信息，一般是动态扩容

文本框

package com.dongfang.lesson06;

import javax.swing.*;
import java.awt.*;

public class TestTextDemo01 extends JFrame {
    public TestTextDemo01() {

        Container container = this.getContentPane();

        JTextField textField1 = new JTextField("hello");
        JTextField textField2 = new JTextField("world",20);

        container.add(textField1,BorderLayout.NORTH);
        container.add(textField2,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo01();
    }
}

密码框

package com.dongfang.lesson06;

import javax.swing.*;
import java.awt.*;

public class TestTextDemo02 extends JFrame {
    public TestTextDemo02() {

        Container container = this.getContentPane();

        //面板

        JPasswordField passwordField = new JPasswordField();//******
        passwordField.setEchoChar('*');

        container.add(passwordField);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo02();
    }
}

文本域

贪吃蛇

帧如果时间片足够小，就是动画，一秒30帧 60帧连起来是动画，拆开就是静态的图片

键盘监听

定时器Timer

定义数据
画上去
监听事件

package com.dongfang.snake;

import javax.swing.*;

public class StartGame {
    public static void main(String[] args) {
        JFrame frame = new JFrame();

        frame.setBounds();
        frame.setResizable(false);//窗口大小不可变
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //正常的游戏界面都应该在面板上
        frame.add(new GamePanel());

        frame.setVisible(true);
    }
}

package com.dongfang.snake;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;

//游戏的面板
public class GamePanel extends JPanel implements KeyListener, ActionListener {

    //定义蛇的数据结构
    int length;//蛇的长度
    int[] snakeX = new int[900];//蛇的X坐标
    int[] snakeY = new int[900];//蛇的Y坐标
    String fx;

    //食物的坐标
    int foodX;
    int foodY;
    Random random = new Random();

    int score;//成绩

    //游戏当前的状态  开始  停止
    boolean isStart = false;//默认是不开始

    boolean isFail = false;//游戏状态失败

    //定时器  以毫秒为单位
    Timer timer = new Timer(100,this);//100毫秒执行一次

    //构造器
    public GamePanel() {
        init();
        //获得焦点和键盘事件
        this.setFocusable(true);//获得焦点事件
        this.addKeyListener(this);//获得键盘监听事件
        timer.start();//游戏一开始，定时器就启动
    }

    //初始化方法
    public void init(){
        length = 3;
        snakeX[0] = 100;snakeY[0] = 100;//脑袋的坐标
        snakeX[1] = 75;snakeY[1] = 100;//第一个身体的坐标
        snakeX[2] = 50;snakeY[2] = 100;//第二个身体的坐标
        fx = "right";//初始方向向右

        //把食物随机分布在界面上
        foodX = 25 + 25*random.nextInt(48);
        foodY = 75 + 25*random.nextInt(36);

        score = 0;
    }


    //绘制面板,游戏中的所有东西，都是用这个画笔来画
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);//清屏
        //绘制静态的面板
        this.setBackground(Color.BLACK);
        Data.header.paintIcon(this,g,25,25);//头部广告栏画上去
        g.fillRect(25,75,1200,900);//默认的游戏界面

        //把小蛇画上去
        if (fx.equals("right")){
            Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);//蛇头初始化向右，通过方向来判断
        }else if (fx.equals("left")){
            Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if (fx.equals("up")){
            Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);
        }else if (fx.equals("down")){
            Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);
        }

        for (int i = 0;i < length;i++){
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
        }

        //画积分
        g.setColor(Color.BLACK);
        g.setFont(new Font("微软雅黑",Font.BOLD,20));//设置字体
        g.drawString("长度"+length,1100,25);
        g.drawString("分数"+score,1100,50);

        //画食物
        Data.food.paintIcon(this,g,foodX,foodY);

        //游戏状态
        if (isStart==false){
            g.setColor(Color.BLACK);
            g.setFont(new Font("微软雅黑",Font.BOLD,50));//设置字体
            g.drawString("按下空格开始游戏",300,300);
        }

        if (isFail == true){
            g.setColor(Color.BLACK);
            g.setFont(new Font("微软雅黑",Font.BOLD,50));//设置字体
            g.drawString("失败，按下空格重新开始",300,300);
        }
    }

    //键盘监听事件
    @Override
    public void keyPressed(KeyEvent e){
        int keyCode = e.getKeyCode();//获得键盘按键是哪一个
        if (keyCode == KeyEvent.VK_SPACE){//如果按下的是空格
            if (isFail){
                //重新开始
                isFail = false;
                init();
            }else {
                isStart = !isStart;//取反
            }
            repaint();
        }
        //小蛇移动
        if (keyCode == KeyEvent.VK_W){
            fx = "up";
        }else if (keyCode == KeyEvent.VK_S){
            fx = "down";
        }else if (keyCode == KeyEvent.VK_A){
            fx = "left";
        }else if (keyCode == KeyEvent.VK_D){
            fx = "right";
        }
    }

    //事件监听  需要通过固定的时间来刷新  1秒10次
    @Override
    public void actionPerformed(ActionEvent e){
        if (isStart &&  isFail == false){//如果游戏是开始状态，就让小蛇动起来

            //吃食物
            if (snakeX[0] == foodX && snakeY[0] == foodY){
                length++;//长度加一
                length++;
                //分数加十
                score = score + 10;
                //再次随机食物
                foodX = 25 + 25*random.nextInt(48);
                foodY = 75 + 25*random.nextInt(36);
            }

            //移动
            for (int i = length-1;i > 0;i--){
                snakeX[i] = snakeX[i-1];
                snakeY[i] = snakeY[i-1];//向前移动一节
            }

            //走向
            if (fx.equals("right")){
                snakeX[0] = snakeX[0]+25;
                if (snakeX[0]>1200){
                    snakeX[0] = 25;
                }//边界判断
            }else if(fx.equals("left")){
                snakeX[0] = snakeX[0]-25;
                if (snakeX[0]<25){
                    snakeX[0] = 1200;
                }//边界判断
            }else if(fx.equals("up")){
                snakeY[0] = snakeY[0]-25;
                if (snakeY[0]<75){
                    snakeY[0] = 900;
                }//边界判断
            }else if(fx.equals("down")){
                snakeY[0] = snakeY[0]+25;
                if (snakeY[0]>900){
                    snakeY[0] = 75;
                }//边界判断
            }
            //失败判断，撞到自己就算失败
            for (int i = 0;i < length;i++){
                if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
                    isFail = true;
                }
            }

            repaint();//重画小蛇
        }
        timer.start();//定时器开启
    }
}

package com.dongfang.snake;

import javax.swing.*;
import java.net.URL;

//数据中心
public class Data {

    //相对路径  tx.png
    //绝对路径  相当于当前的项目
    private static URL headerURL = Data.class.getResource("statics/header.png");
    private static URL bodyURL = Data.class.getResource("statics/body.png");
    private static URL foodURL = Data.class.getResource("statics/food.png");
    private static URL upURL = Data.class.getResource("statics/up.png");
    private static URL downURL = Data.class.getResource("statics/down.png");
    private static URL leftURL = Data.class.getResource("statics/left.png");
    private static URL rightURL = Data.class.getResource("statics/right.png");

    public static ImageIcon header = new ImageIcon(headerURL);
    public static ImageIcon body = new ImageIcon(bodyURL);
    public static ImageIcon food = new ImageIcon(foodURL);
    public static ImageIcon up = new ImageIcon(upURL);
    public static ImageIcon down = new ImageIcon(downURL);
    public static ImageIcon left = new ImageIcon(leftURL);
    public static ImageIcon right = new ImageIcon(rightURL);
}