Thread: WHy is it going straight to my exception?

 
boolean markCheck = true;
     do{
       try{
        for (int i = 0; i <= amountAssignment-1; i++ ) {
          System.out.print("Homework Mark for Assignment " +(i+1) + ": ");
          homeworkMark[i] = Integer.parseInt(sc.nextLine());
          System.out.print("Examination Mark for Assignment " + (i+1) + ": ");
          examinationMark[i] = Integer.parseInt(sc.nextLine());
          markCheck = false;
        }
      }catch (Exception e) {
        System.out.println("------------");
        System.out.println("   ERROR    ");
        System.out.println("------------");   
      }
     }while (markCheck == true);

After asking the mark for assignment 1 it goes directly to my exception without allowing to user to enter anything. After that it works fine!

Cannot understand why

-------------OUTPUT------------

Student Number: 567
Family name: Malcolm
First Name: tanti
Subjects: 1. Boat Maintenance
2. Basic Sail Control
3. Blue Water Navigation
4. Chart Reading
5. Laws and Customs of the sea

Subject: 3
How many assignments shall I calculate? : 2
Homework Mark for Assignment 1: ------------
ERROR
------------
Homework Mark for Assignment 1: f
------------
ERROR
------------
Homework Mark for Assignment 1: 23
Examination Mark for Assignment 1: 45
Homework Mark for Assignment 2: 65
Examination Mark for Assignment 2: 34

ok, i did that. no idea whats its on about though

java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Num berFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:504)
at java.lang.Integer.parseInt(Integer.java:527)
at RecordingCalculating.main(RecordingCalculating.jav a:35)
at __SHELL16.run(__SHELL16.java:6)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at bluej.runtime.ExecServer$3.run(ExecServer.java:725 )

ah, i get it.. so the number is being accepted as a string and parsed into an integer. The string is forcing it to go straight to the exception?

It works with .nextInt();

Thanks!