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：