为什么这两个代码，不需要遍历数组也可以输出数组

代码一

package shuzu;
import java.util.Scanner;
public class Shangji5 {
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        
        char[] ziMu = {'a','c','u','b','e','p','f','z'};
        char cha = 'm';
        int xiaBiao = 5;
        System.out.print("原字符排序：");
        System.out.println(ziMu);
        System.out.println("待插入的字符:"+cha);
        System.out.println("插入字符的下标是："+xiaBiao);
        ziMu[xiaBiao] = cha;
        System.out.print("插入后的字符排序是：");
        System.out.print(ziMu);
    }
}

代码二

public class Shangji4 {
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        char[] ziMu = new char[9];
        ziMu[0] = 'a';
        ziMu[1] = 'c';
        ziMu[2] = 'u';
        ziMu[3] = 'b';
        ziMu[4] = 'e';
        ziMu[5] = 'p';
        ziMu[6] = 'f';
        ziMu[7] = 'z';
        char cha = 'm';
        int xiaBiao = 5;
        System.out.print("原字符排序：");
        System.out.println(ziMu);
        System.out.println("待插入的字符:"+cha);
        System.out.println("插入字符的下标是："+xiaBiao);
        for(int i = ziMu.length - 1;i > xiaBiao;i--){
            ziMu[i] = ziMu[i-1];
        }
        ziMu[xiaBiao] = cha;
        System.out.print("插入后的字符排序是：");
        System.out.print(ziMu);
    }
}

看看这个回答：
https://zhidao.baidu.com/question/922711179492997099.html