Debug error

Question

Please help me debug this code. Thank you.
/* college java class */
import containers.Input;
public class college
     static Student s[] =new Student[100];
     static int index;
     public static void initialiseObjects()
          for(index=0;index<100;index++)
               s[index] = new Student();
               s[index].name = "xxx";
     public static void Addstudent()
          index=0;
          while(!(s[index].name.equals("xxx")) &&index<100)
               index++;
          if (index==100)
               System.out.println("full up - no more space");
          else
               s[index].getStudentDetails();
     public static void ListStudentDetails()
          for(index=0;index<100;index++)
               if(!(s[index].name.equals("XXX")))
                    s[index].displayStudentList();
     public static void menu()
          System.out.println("1. enter student details");
          System.out.println("2. List student details");
          System.out.println("3. exit");
     public static int getChoice()
          int c;
          System.out.print("enter your choice >>");
          c = Input.readInt();
          while(c< 1|| c > 3)
               System.out.print("out of range input, please try again>>");
               c = Input.readInt();
          return c;
     public static void main(String args[])
          int choice;
          initialiseObjects();
          do
               menu();
               choice = getChoice();
               switch (choice)
                    case 1: AddStudent();
                    break;
                    case 2: ListStudentDetails();
                    break;
          while(choice != 3);
}

Answer 1

How do you expect somebody to debug something when you didn't even define the 'correct' behaviour? Does it compile? Does it throw exception at runtime? Does it generate incorrect results? What do you expect to happen when you run it and what happens in fact?
Mike