Arraylist.addall(c) 方法

来源：互联网发布：手机看最新电影软件编辑：程序博客网时间：2024/06/05 07:18

下面的示例演示java.util.Arraylist.addall(c) 方法的用法。

package com.yiibai;import java.util.ArrayList;public class ArrayListDemo {  public static void main(String args[]) {    // create an empty array list1 with an initial capacity    ArrayList<Integer> arrlist = new ArrayList<Integer>(5);    // use add() method to add elements in the list    arrlist.add(12);    arrlist.add(20);    arrlist.add(45);    // let us print all the elements available in list1    System.out.println("Printing list1:");    for (Integer number : arrlist) {      System.out.println("Number = " + number);    }    // create an empty array list2 with an initial capacity    ArrayList<Integer> arrlist2 = new ArrayList<Integer>(5);    // use add() method to add elements in list2    arrlist2.add(25);    arrlist2.add(30);    arrlist2.add(31);    arrlist2.add(35);    // let us print all the elements available in list2    System.out.println("Printing list2:");    for (Integer number : arrlist2) {      System.out.println("Number = " + number);    }    // inserting all elements, list2 will get printed after list1    arrlist.addAll(arrlist2);    System.out.println("Printing all the elements");    // let us print all the elements available in list1    for (Integer number : arrlist) {       System.out.println("Number = " + number);    }  }}

让我们来编译和运行上面的程序，这将产生以下结果：

Printing list1:Number = 12Number = 20Number = 45Printing list2:Number = 25Number = 30Number = 31Number = 35Printing all the elementsNumber = 12Number = 20Number = 45Number = 25Number = 30Number = 31Number = 35

0 0