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：