黑馬程式員——java基礎 ArrayList集合基本方法示範

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java基礎 ArrayList集合基本方法示範

import java.util.ArrayList;import java.util.Iterator;public class ArrayListDemos {public static void main(String[] args) {// 建立一個新的容器ArrayList al = new ArrayList();al.add("abc1");al.add("abc2");al.add("abc3");al.add("abc4");al.add("abc5");printListMethod(al);System.out.println("-----------------------------------------------");//---------------------------------------------------        al.removeAll(al);        al.add(new Student("lisi",22));        al.add(new Student("wangwu",25));        al.add(new Student("kkk",26));        al.add(new Student("wangwu",25));        Iterator<Student>  it = al.iterator();        while(it.hasNext())        {        Student s = it.next();        System.out.println("the student name is :"+s.getName()+"\tand the age is :"+s.getAge());        }    }private static void printListMethod(ArrayList al) {// TODO Auto-generated method stubIterator it = al.iterator();while(it.hasNext()){System.out.println(it.next());}}}class Student{private String name;private int age;Student(String name ,int age){this.name=name;this.age = age;}public int getAge(){return age;}public String getName(){return name;}public String toString(){return "the student name : +name "+"  and  age is : "+ age;}}

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黑馬程式員——java基礎 ArrayList集合基本方法示範