10 2023 档案

摘要：package com_black.System; public class SystemDemo01 { public static void main(String[] args) { System.out.println("开始"); System.exit(0);//调用此方法会直接终止虚拟 阅读全文

摘要：//局部类 package com_black.InnerClass.jubu_neibulei; public class Outer { private int m=66; public void method(){ int m2=99; class In{ public void show() 阅读全文

摘要：package com_black.InnerClass.s1; public class Outer { private int s=10; /*public class Inner{ public void show(){ System.out.println(s); */ private cl 阅读全文

摘要：package com_black.InnerClass.s1; public class Outer { private int s=10; /*public class Inner{ public void show(){ System.out.println(s); */ private cl 阅读全文

摘要：package com_black.jiekou.Demo01;public interface English { public abstract void speak();} package com_black.jiekou.Demo01;public abstract class Person 阅读全文

摘要：package com_black.jiekou;public interface Jumping { public abstract void jump();} package com_black.jiekou;public abstract class Animal { private Stri 阅读全文

摘要：package com_black.Abstract;public abstract class Animal { public abstract void eat(); //抽象类里可以有具体的方法 public void sleep(){ System.out.println("睡觉"); }} 阅读全文