Java ArrayDeque clone()方法

java.util.ArrayDeque.clone() 此方法返回此双端队列的副本。

1 语法

public ArrayDeque<E> clone()

2 参数

无

3 返回值

返回此双端队列的副本。

4 示例 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.util.ArrayDeque.clone()方法的例子
 */
import java.util.ArrayDeque;
import java.util.Deque;

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

        // create an empty array deque with an initial capacity
        ArrayDeque<Integer> deque1 = new ArrayDeque<Integer>(8);

        // use add() method to add elements in the deque
        deque1.add(15);
        deque1.add(30);
        deque1.add(20);
        deque1.add(18);

        // clone the first deque,
        Deque<Integer> deque2 = deque1.clone();

        // let us print all the elements available in deque2
        // now deque2 should have similar elements to deque1.
        for (Integer number : deque2) {
            System.out.println("Number = " + number);
        }
    }
}

输出结果为：

Number = 15
Number = 30
Number = 20
Number = 18