1.題目描述

2.思路

import java.util.Arrays;public class H189 {public static void main(String[] args) {int[] newArr = {1, 2, 3, 4, 5};int[] nums = new int[5];System.arraycopy(newArr,0,nums,0,4);System.out.println(Arrays.toString(nums));
}
}

補充2：

3.代碼實現

import java.util.Arrays;public class H189 {public void rotate(int[] nums, int k) {int n=nums.length;//獲取數組的長度int[] newArr=new int[n];for(int i=0;i<n;i++){newArr[(i+k)%n]=nums[i];}System.arraycopy(newArr, 0, nums, 0, n);}public static void main(String[] args) {H189 test3=new H189();int[] nums={1,2,3,4,5,6,7};test3.rotate(nums,3);System.out.println(Arrays.toString(nums));//    int[] newArr = {1, 2, 3, 4, 5};
//    int[] nums = new int[5];
//    System.arraycopy(newArr,1,nums,0,4);
//    System.out.println(Arrays.toString(nums));
}
}