Java学习List之案例ArrayList集合存储学生对象用三种方式遍历

package com.itheima_82;
/*
  案例：ArrayList集合存储学生对象用三种方式遍历
  需求：创建一个存储学生对象的集合，存储3个学生对象，使用程序实现在控制台遍历该集合
  思路：
     1.定义学生类
     2.创建ArrayList对象
     3.创建学生对象
     4.把学生添加到集合
     5.遍历集合
         5.1 迭代器
         5.2 普通for循环
         5.3 增强for

 */
import java.util.ArrayList;
import java.util.Iterator;

public class ArrayListDemo {
    public static void main(String[] args) {
        //创建ArrayList对象
        ArrayList<Student>  arrayList = new ArrayList<Student>();
        //创建学生对象
        Student s1 = new Student("王梓诺",6);
        Student s2 = new Student("王梓嫣",4);
        Student s3 = new Student("李木一",7);
        //把学生添加到集合
        arrayList.add(s1);
        arrayList.add(s2);
        arrayList.add(s3);
        //迭代器
        Iterator<Student> it = arrayList.iterator();
        while (it.hasNext()){
            Student s = it.next();
            System.out.println(s.getName()+","+s.getAge());
        }
        System.out.println("-------");
        //普通for循环
        for(int i = 0;i<arrayList.size();i++){
            Student s = arrayList.get(i);
            System.out.println(s.getName()+","+s.getAge());
        }
        System.out.println("--------");
        //增强for
        for(Student s:arrayList){
            System.out.println(s.getName()+","+s.getAge());
        }
    }
}

package com.itheima_82;
/*
  定义学生类
 */
public class Student {
    private String name;
    private int age;
    public Student(){
    }

    public Student(String name, int age) {
        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;
    }
}