2023.7.30 周六：内部类
//outer public class Outer { private int id; public void out(){ System.out.println("外部类方法的调用"); } public class inner{ public void in(){ System.out.println("内部类方法的调用"); } } } //main public class Main { public static void main(String[] args) { Outer outer = new Outer(); Outer.inner inner = outer.new inner(); inner.in(); } }