class Student
{
	private String name;
	private int age;

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

//自定義比較器：先按名字來排序，如果名字相同再按年齡
class Mycompare implements Comparator
{
	public int compare(Object o1,Object o2)
	{
		Student s1 = (Student)o1;
		Student s2 = (Student)o2;

		int num = s1.getName().compareTo(s2.getName());
		if (num == 0)
			return new Integer(s1.getAge()).compareTo(new Integer(s2.getAge()));
		return num;
	}
}
class Test 
{
	public static void main(String[] args) 
	{
		TreeSet<Student> ts = new TreeSet<Student>(new Mycompare());

		ts.add(new Student("lisi02",22));
		ts.add(new Student("lisi02",21));
		ts.add(new Student("lisi007",20));
		ts.add(new Student("lisi09",19));
		ts.add(new Student("lisi06",18));
		ts.add(new Student("lisi06",18));
		ts.add(new Student("lisi007",29));
				
		for (Iterator<Student> it = ts.iterator();it.hasNext() ; )
		{
			Student stu = it.next();
			System.out.println(stu.getName()+".."+stu.getAge());
		}
	}
}