一维数组的初始化及遍历 Day06

package com.sxt.arraytest1;

import java.util.Arrays;

/*
 * 一维数组
 */
public class ArrayTest2 {
    public static void main(String[] args) {
        //动态初始化
        int[] arr1 = new int[5];
        System.out.println(Arrays.toString(arr1));//初始化为0:[0, 0, 0, 0, 0]
        String[] s = new String[3];//初始化为null：[null, null, null]
        System.out.println(Arrays.toString(s));

        //静态初始化1
        int[] arr2 = {1,3,4,5,7};
        System.out.println(Arrays.toString(arr2));
        //静态初始化2
        int[] arr3 = new int[]{2,3,5,6,7};
        System.out.println(Arrays.toString(arr3));

        //一维数组的遍历方式一:可以操作下标
        for(int i=0; i<arr3.length; i++){
            System.out.print(arr3[i]+" ");
        }
        System.out.println();
        //一维数组的遍历方式二:增强for循环 简单
        for(int num: arr3){
            System.out.print(num + " ");
        }
    }
}