Java ArrayList remove()方法

java.util.ArrayList.remove(int index) 该方法用于从ArrayList中移除指定索引的元素。

1 语法

public E remove(int index)

2 参数

index：要删除的元素的索引。

3 返回值

返回ArrayList中删除的元素。

4 示例

package com.yiidian;

/**

* 一点教程网： http://www.yiidian.com

*/

/**

* java.util.ArrayList.remove(int index)方法的例子

*/

import java.util.ArrayList;

public class Demo {

public static void main(String[] args) {

// create an empty array list with an initial capacity

ArrayList arrlist = new ArrayList(5);

// use add() method to add elements in the deque

arrlist.add(20);

arrlist.add(15);

arrlist.add(30);

arrlist.add(45);

System.out.println("Size of list: " + arrlist.size());

// let us print all the elements available in list

for (Integer number : arrlist) {

System.out.println("Number = " + number);

}

// Removes element at 3rd position

arrlist.remove(2);

System.out.println("Now, Size of list: " + arrlist.size());

// let us print all the elements available in list

for (Integer number : arrlist) {

System.out.println("Number = " + number);

}

}

}

输出结果为：

Size of list: 4

Number = 20

Number = 15

Number = 30

Number = 45

Now, Size of list: 3

Number = 20

Number = 15

Number = 45