java基础学习：random随机数，random案例

1.Random使用步骤：

package com.itheima.Random;

import java.util.Random;

public class Random1 {
    public static void main(String[] args) {
        Random random=new Random();

        for (int i=1;i<=10;i++) {
            int data=random.nextInt(10);//nextInt(n)生成0-n-1的随机数
            System.out.println(data);
        }
    }
}

2.Random案例：

猜数字案例：

package com.itheima.Random;

import java.util.Random;
import java.util.Scanner;

public class Random2 {
    public static void main(String[] args) {
        Random random=new Random();
        int luckNumber=random.nextInt(100)+1;
        Scanner sc=new Scanner(System.in);
        while(true){
            System.out.println("请输入猜测数据");
            int gussNumber=sc.nextInt();
            if(gussNumber>luckNumber){
                System.out.println("猜测数字过大");
            } else if (gussNumber<luckNumber) {
                System.out.println("猜测数字过小");
            }
            else {
                System.out.println("猜对了");
                break;
            }
        }
    }
}