摘要:
package xuexi; 父级 public class Fu { int num=0; public void eat() { System.out.println("父亲在吃饭"); } } 子级 package xuexi; public class Zi extends Fu{ int num=9;//子类成员变量 publi... 阅读全文
摘要:
package com.oracle.demo01; import java.util.ArrayList; import java.util.Scanner; public class Demo01 { public static void main(String[] args) { System.out.println("=====================... 阅读全文