Random类

package Format_daqo;

import java.util.Arrays;
import java.util.Random;

public class Randoms {

    public static void main(String[] args) {
        int[] score =new int[100];
        //取100个0到100之间的随机数
        for (int i = 0; i < score.length; i++) {
            score[i]=(int)(Math.random()*101);
        }
        System.out.println(Arrays.toString(score));
        //查找100分的或0分的
        for (int i = 0; i < score.length; i++) {
            if(score[i]==0||score[i]==100){
                System.out.println(i+"\t"+score[i]);
            }
        }
        
        System.out.println("-----------------");
        
        //Random
        Random rand=new Random();
        double[] arr=new double[50];
        for (int i = 0; i < arr.length; i++) {
            arr[i]=rand.nextDouble()*100;
        }
        System.out.println(Arrays.toString(arr));
    }
    
}