循环置换数组元素的 Java 程序

原文:https://www . geesforgeks . org/Java-程序循环置换数组元素/

给定一个整数数组，我们在那里循环置换它的元素，也就是说，将每个数组元素向左移动一个索引。第一个值将进入最后一个索引。

例:

Input:    [1,2,3,4,5]
Output: [2,3,4,5,1]

Input:     [2,3,1,5,6]
Output:    [3,1,5,6,2]

方法#1

  1. In the function cyclic shift (), the cycle is (I = 0；; A < arr.length; I++) Traverse the array and move each element by one position.
  2. The first value of the array is stored in the variable x before the loop.
  3. Finally, the last element of the array is set to X. 。

Java

// Java Program to Cyclically Permute 
// the Elements of an Array
import java.util.*;
import java.io.*;
// function to print the array
class cycle {
    public int[] cycleShift(int[] arr)
    {
        int x = arr[0]; // store a[0]
        int i;
        for (i = 0; i < arr.length - 1; i++) {

            // for other element shift left
            arr[i] = arr[i + 1];
        }
        // for the last element in the modified array
        // it will be starting element
        arr[i] = x;
        return arr;
    }
}
public class GFG {

    public static void main(String[] args)
    {
        int[] arr = { 1, 2, 3, 4, 5 };
        cycle c = new cycle();
        int[] newArray = c.cycleShift(arr);
        for (int i = 0; i < newArray.length; i++) {
            System.out.print(newArray[i] + " ");
        }
    }
}

输出

2 3 4 5 1

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