java.util.Collections.rotate() 方法

package com.codingdict;

import java.util.*;

public class CollectionsDemo {
   public static void main(String[] args) {

      // create array list object
      List numbers = new ArrayList();

      // populate the list
      for (int i = 0; i < 15; i++) {
         numbers.add(i);
      }

      System.out.println("Before : "+Arrays.toString(numbers.toArray()));

      // rotate the list at distance 10
      Collections.rotate(numbers, 10);

      System.out.println("After : "+Arrays.toString(numbers.toArray()));
   }
}