import java.util.*;	//匯入包
class Student implements Comparable	//定義學生類，並且讓其具有比較性
{
	private int age;
	private String name;
	private String id;

	Student(String name,int age,String id)
	{
		this.name = name;
		this.age = age;
		this.id = id;
	}

	public int compareTo(Object obj)
	{
		if (!(obj instanceof Student))
			throw new RuntimeException("不是學生物件");
		else
		{
			System.out.println(this.getName()+"       "+this.getAge());
			Student s = (Student) obj;
			if(this.age != s.age)
			    return this.age - s.age;
			else if(this.name != s.name)
				return this.name.compareTo(s.name);
			return this.id.compareTo(s.id);
		}

	}
	
	public String getName()
	{
		return(this.name);
	}
	
	public int getAge()
	{
		return(this.age);
	}

	public String getId()
	{
		return(this.id);
	}
}

class MyCompartor implements Comparator	//定義一個比較器
{
	public int compare(Object obj1,Object obj2)
	{
		if (!(obj1 instanceof Student)&&(obj2 instanceof Student))
			throw new RuntimeException(obj1+"and"+obj2+"中有物件不是學生類");
		else
		{
			Student stu1 = (Student) obj1;
			Student stu2 = (Student) obj2;

			int num1 = new Integer(stu1.getName().length()).compareTo(new Integer(stu2.getName().length()));
			if (num1 == 0)
			{
				int num2 = new Integer(stu1.getAge()).compareTo(new Integer(stu2.getAge()));
				if(num2 == 0)
				{
					return new String(stu1.getId()).compareTo(new String(stu2.getId()));
				}
				return num2;
			}
			return num1;
		}
	}
}
class MyTreeSet
{
	public static void main(String[] args) 
	{
		TreeSet ts = new TreeSet(new MyCompartor());
		ts.add(new Student("Zhang,Honemi",23,"520"));
		ts.add(new Student("Zhang,Honemi",22,"520"));
		ts.add(new Student("Zhang,Honemi",25,"520"));
		ts.add(new Student("Zhang,Honemi",23,"521"));
		ts.add(new Student("Zhang,Honemix",23,"520"));

		for (Iterator it = ts.iterator();it.hasNext() ; )
		{
			Student stu = (Student)it.next();
			System.out.println(stu.getName()+"……"+stu.getAge()+"……"+stu.getId());
		}
	}
}