Java day3

目录
分支语句–>Random

//import java.util.Scanner;
//import java.util.Random;
import java.util.Random;
import java.util.Scanner;
public class three{
	public static void main(String[] arge){
		
		//创建对象
		//Random r=new Random();
		
		//用循环获取10个随机数
		
		/*
		for(int i=0;i<10;i++){
			//获取随机数
			int number=r.nextInt(10);//获取数据的范围[0,10)
			System.out.println("number:"+number);
		}
		*/
		Random r=new Random();
		//获取1-100之间的随机数
		int number=r.nextInt(100)+1;
		Scanner sc=new Scanner(System.in);
		
		System.out.println("请输入你要猜的数字:");
		while(true){
			int guessNumber=sc.nextInt();
			
			if(guessNumber>number){
				System.out.println("你猜的数字"+guessNumber+"大了");
			}
			else if(guessNumber<number){
				System.out.println("你猜的数字"+guessNumber+"小了");
			}
			else{
				System.out.println("恭喜你猜中了");
				break;
			}
		}
		
		
		//System.out.println(x);
		//System.out.println("开始");
		/*
		Scanner sc=new Scanner(System.in);
		System.out.println("0时0分");
		System.out.println("0时1分");
		System.out.println("0时2分");
		System.out.println("0时3分");
		System.out.println("--------");
		System.out.println("1时0分");
		System.out.println("1时1分");
		System.out.println("1时2分");
		System.out.println("1时3分");
		System.out.println("--------");
		System.out.println("2时0分");
		System.out.println("2时1分");
		System.out.println("2时2分");
		System.out.println("2时3分");
		*/
		
		//循环改进
		/*
		for(int minute=0;minute<4;minute++)
		{
			System.out.println("0时"+minute+"分");
		}
		System.out.println("--------");
		for(int minute=0;minute<4;minute++)
		{
			System.out.println("1时"+minute+"分");
		}
		System.out.println("--------");
		for(int minute=0;minute<4;minute++)
		{
			System.out.println("2时"+minute+"分");
		}
		System.out.println("--------");
		*/
		
		//外循环控制小时的范围，内循环控制分钟的范围
		/*
		for(int hour=0;hour<24;hour++){
			for(int minute=0;minute<60;minute++){
				System.out.println(hour+"时"+minute+"分");
			}
			System.out.println("--------");
		}
		*/
		/*for(int i=1;i<=5;i++)
		{
			if(i%2==0)
			{
				//continue;
				break;
			}
			System.out.println(i);
		}*/
		/*do{
			System.out.println("Hello World");
		}while(true);*/ 
		/*while(true)
		{
			System.out.println("Hello World");
		}*/
		//int k=0;
		/*for(;;){
			System.out.println("Hello World");
		}*/
		//System.out.println(a);
		//System.out.println("----------");
		/*int b=1;
		while(b<3){
			System.out.println("Hello World");
			b++;
		}
		System.out.println(b);*/
		//System.out.println("----------");
		/*int c=1;
		do{
			System.out.println("Hello World");
			c++;
		}while(c<3);
		*/
		
		
		
		
		
		
		
		
		
		
		//System.out.println("请输入一个月数：");
		//int cc=sc.nextInt();
		/*
		double paper=0.1;
		int count=0;
		int zf=8844430;
		while(paper<zf)
		{		
			paper*=2;
			count++;
		}
		System.out.println("折叠"+count+"次");
		*/
		/*
		System.out.println("--------");
		for(int i=100;i<=999;i++){
			int a=i%10;
			int b=i/10%10;
			int c=i/100;
			if(a*a*a+b*b*b+c*c*c==i){
				sum++;
			}
		}System.out.println("水仙花共有"+sum+"个");
		*/
		//System.out.println("1-100之间的偶数和是："+sum);
		//System.out.println(sum);
		/*
		int month=sc.nextInt();
		//case穿透
		switch(month)
		{
			case 12:
				//System.out.println("冬季");
				//break;
			case 1:
				//System.out.println("冬季");
				//break;
			case 2:
				System.out.println("冬季");
				break;
			case 3:
				//System.out.println("春季");
				//break;
			case 4:
				//System.out.println("春季");
				//break;
			case 5:
				System.out.println("春季");
				break;
			case 6:
				//System.out.println("夏季");
				//break;
			case 7:
				//System.out.println("夏季");
				//break;
			case 8:
				System.out.println("夏季");
				break;
			case 9:
				//System.out.println("秋季");
				//break;
			case 10:
				//System.out.println("秋季");
				//break;
			case 11:
				System.out.println("秋季");
				break;	
			default:
				System.out.println("请输入正确的月数");
				break;
		}
		*/
		/*
		switch(week)
		{
			case 1:
				System.out.println("星期一");
				break;
			case 2:
				System.out.println("星期二");
				break;
			case 3:
				System.out.println("星期三");
				break;
			case 4:
				System.out.println("星期四");
				break;
			case 5:
				System.out.println("星期五");
				break;
			case 6:
				System.out.println("星期六");
				break;
			case 7:
				System.out.println("星期七");
				break;
			default:
				System.out.println("请输入正确的星期数");
				break;
		}
		*/
		//System.out.println("结束");
		
	}
	
}

本文地址：https://blog.csdn.net/qq_45974939/article/details/107382849