Java基础知识强化之集合框架笔记24：ArrayList存储自定义对象并遍历

1. ArrayList存储自定义对象并遍历

2. 代码示例：

Student.java，如下：

 package cn.itcast_01;

 public class Student {

     private String name;

     private int age;

     public Student() {

         super();

     }

     public Student(String name, int age) {

         super();

         this.name = name;

         this.age = age;

     }

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public int getAge() {

         return age;

     }

     public void setAge(int age) {

         this.age = age;

     }

 }

测试类ArrayListDemo2：

 package cn.itcast_01;

 import java.util.ArrayList;

 import java.util.Iterator;

 /*

  * ArrayList存储自定义对象并遍历

  */

 public class ArrayListDemo2 {

     public static void main(String[] args) {

         // 创建集合对象

         ArrayList array = new ArrayList();

         // 创建学生对象

         Student s1 = new Student("武松", 30);

         Student s2 = new Student("鲁智深", 40);

         Student s3 = new Student("林冲", 36);

         Student s4 = new Student("杨志", 38);

         // 添加元素

         array.add(s1);

         array.add(s2);

         array.add(s3);

         array.add(s4);

         // 遍历

         Iterator it = array.iterator();

         while (it.hasNext()) {

             Student s = (Student) it.next();

             System.out.println(s.getName() + "---" + s.getAge());

         }

         System.out.println("----------------");

         for (int x = 0; x < array.size(); x++) {

             // ClassCastException 注意，千万要搞清楚类型

             // String s = (String) array.get(x);

             // System.out.println(s);

             Student s = (Student) array.get(x);

             System.out.println(s.getName() + "---" + s.getAge());

         }

     }

 }

运行效果如下：