用户数组缩减

import java.util.Scanner;
public class Eext {
public static void main(String[] args) {
Scanner myscanner = new Scanner(System.in);

//缩减

int[] arr = {1,2,3,4,5}; //创建一个原始数组

do {
int[] arr2 = new int[arr.length -1]; //创建一个 原始数组 减一的数组

for (int i = 0; i < arr.length - 1; i++) {
arr2[i] = arr[i]; //将arr的值 赋给arr2
}

arr = arr2; //让arr 指向 arr2

for (int i = 0; i < arr.length; i++) {
System.out.println(arr[i]); //遍历arr
}

System.out.println("是否还需要缩减？y/n");
char key = myscanner.next().charAt(0);
if (key == 'n') {
System.out.println("已结束");
break;
}

}while(true);
}
}