摘要：随机红包 import java.util.Random; import java.util.Scanner; public class RedEnvelope { public static void main(String[] args) { System.out.println(" 微信抢红包 阅读全文

摘要：instanceof关键字和向上向下转型 public class Computer {//电脑 public static void main(String[] args) { Pad pad = new Pad(); HuaWeiPad huaWeiPad = new HuaWeiPad(); 阅读全文

摘要：直接选择排序 package com.ydlclass; public class Test { public static void main(String[] args) { int[] a = {14,8,74,32}; int index;//下标 for (int i = 1; i < a 阅读全文

摘要：冒泡排序 package com.ydlclass; public class Test { public static void main(String[] args) { int[] a = {14,8,74,32}; for (int i = 1; i < a.length ; i++) {/ 阅读全文

摘要：二维数组输出“春眠” package com.ydlclass; public class Test { public static void main(String[] args) { char [][] cm = {{'春','眠','不','绝','晓','，'},{'处','处','闻',' 阅读全文