《数组》示范代码

package com.wwq.shuzu;

import java.util.Arrays;
import java.util.Scanner;

public class shuzu {
    public static void main(String[] args) {
        System.out.printf("请输入数组的个数");
        Scanner input = new Scanner(System.in);
        int num = input.nextInt();

        int[] arr;
        arr = new int[num];//数组的定义


        for (int i = 0; i < num; i++) {
            System.out.printf("请输入数组的值");
            Scanner put = new Scanner(System.in);
            int x = put.nextInt();

            arr[i] = x;
        }

        System.out.printf("for循环");
        for (int i = 0; i < num; i++) {
            System.out.printf("\n第"+(i+1)+"个数："+arr[i]);
        }

        System.out.printf("\n只有遍历功能\n");
        for (int x:arr)//对arr进行遍历，每一个元素赋值给x
            System.out.println(x);
    }

}