List集合添加自定义对象

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;
    }
     
}
=======================================
package cn.collection;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Dome1 {
    public static void main(String[] args) {
        List list = new ArrayList();
        
        Student s1 = new Student("张三",17);
        Student s2 = new Student();
        s2.setName("李四");
        s2.setAge(18);
        
        list.add(s1);
        list.add(s2);
        list.add(new Student("王五",19));//匿名对象
        
        //遍历方式1 ：转换成数组
        Object[] obj = list.toArray();
        for(int x=0;x<obj.length;x++){
            Student s = (Student) obj[x];
            System.out.println(s.getName()+":"+s.getAge());
        }
        //遍历方式2：迭代器
        
        Iterator it = list.iterator();
        while(it.hasNext()){
            Student s = (Student) it.next();
            System.out.println(s.getName()+":"+s.getAge());
        }
        
        //便利方式3：增强for
        for(Object s : obj){
            System.out.println(((Student) s).getName()+":"+((Student) s).getAge());
        }
        //遍历方式4 用普通for循环与 get() 和size()结合
        for(int x = 0;x<list.size();x++){
            Student s =  (Student) list.get(x);
            System.out.println(s.getName()+":"+s.getAge());
        }
     }
}