2025年- H13-Lc120-189.轮转数组（普通数组）---java版

1.题目描述

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));
}
}

补充2：

3.代码实现

import java.util.Arrays;

public class H189 {

    public void rotate(int[] nums, int k) {

        int n=nums.length;//获取数组的长度
        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));
}
}