Question

任何人都知道我怎么能限制这个程序只打印数组的20个元素中的5个。

问候和感谢。

import java.util.*;

public class lot {
    public static void main(String[] args) {
        int n[] = {1,2,3,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};

        Random rd = new Random();
        for (int i = 0; i < n.length; i++) {
            System.out.println(rd.nextInt(n[i]) + 1);
        }
    }

}

Answer 1

    import java.util.*;

public class Lot {

public static void main(String[] args) {

        int n[] = {1,2,3,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};

        Random rd = new Random();

        for (int i = 0; i < 5; i++) {

            System.out.println(rd.nextInt(n[i]) + 1);
        }
    }

}

了解如何使用for循环http://en.wikipedia.org/wiki/For_loop#Java

在java中的数组中显示的有限数量的项目

1 个答案: