Collection集合存储自定义对象练习

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;
    }
     
}
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public class Dome1 {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        
        Student s = new Student("张三",19);
        Student s1 = new Student("李四",29);
        
        c.add(s);
        c.add(s1);
        c.add(new Student("王五",18));
        c.add(new Student("赵六",28));
        
        //遍历方式1
        Object[] obj = c.toArray();
        for(int x=0;x<obj.length;x++){
            Student stu = (Student) obj[x];
            System.out.println(stu.getName()+":"+stu.getAge());
        }
        //便利方式2
        Iterator it = c.iterator();
        while(it.hasNext()){
            Student stu = (Student) it.next();
            System.out.println(stu.getName()+":"+stu.getAge());
        }
        //便利方式3
//        Student[] stu = (Student[]) c.toArray();
        for(Object st :obj){
            System.out.println(((Student) st).getName()+":"+((Student) st).getAge());
            
        }
    }    
}