摘要:
1.图形类package com.yfs.javase;public class Shape { //计算面积方法 public double getArea() { System.out.println("计算面积"); return 0; }}2.圆package com.yfs.javas... 阅读全文
摘要:
1.Animal类package com.yfs.javase;public class Animal { public void cry() { System.out.println("动物叫..."); }}2.Dog/Cat/Bird类package com.yfs.javase;publ... 阅读全文
摘要:
1.Personpackage com.yfs.javase;public class Person { private String name; private int age; private char sex; private void privateMehtod() { System.ou... 阅读全文
摘要:
1、Person类package com.yfs.javase;//可以有多个子类public class Person { private String name;// 私有属性不能继承 private int age; private char sex; private void private... 阅读全文
摘要:
1.单例package com.yfs.javase;public class Singleton { //private static final Singleton single = new Singleton();//定义自己的对象引用 private static Singleton s... 阅读全文
摘要:
1、Person类package com.yfs.javase;public class Person { String name;//每个对象上分配 与对象绑定 int age; char sex; boolean married; static String country = "中国";/... 阅读全文
摘要:
1.摇奖小程序package com.yfs.javase;import java.io.IOException;import java.nio.CharBuffer;import java.util.Random;public class Demo1 { /** * 模拟摇奖 */ publi... 阅读全文
摘要:
1.示例var obj = { a:"hello", b:"world", c:"hehe"}var key = 0;for(var oj in obj) { console.log(oj); console.log(obj[oj]); key++;}console.log(key);console... 阅读全文