Where is the mistake?

Question

You told me to create comparable interface and CompareTo method in the main class which Student class to sort it by age.But the question that confuses me where should i put these codes to make it sort , i have tried for 5 hours but i got no benefit. I am going to provide you with the sort codes and tell me if there is any mistake in the following codes. the way of sorting is very easy but how to make them working.Inform me if there is any mistake.I know these codes but i don't know how to use them properly in the program that is why the program doesn't sort by age.Sorry for asking a lot but nobody going to help me. Thanks in advance
i put that code in the student class:public static Comparator<? super Student> Comprator() {
     // TODO Auto-generated method stub
     return null;in the Student Frame Class , i put the code for sorting List  <Student> students = new ArrayList<Student>();
               Collections.sort(students , Student.Comprator());
     lstStudent.setModel(new DefaultComboBoxModel(Student.students.toArray()));

Answer 1

warnerja wrote:
Tolls wrote:
You need to pass one of these:
Comparator
into the call to sort.
You will need to read up on interfaces if you don't understand what the information on that page means.He is passing a Comparator, but it's null. He seems to think: "As long as it compiles, there is no mistake". In that case, just turn in a simple "Hello, World" app every time you are asked to implement something. Hey, it compiles, it must be right!Yep. I probably should have said "You will need to read up on Java...", :)