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Type: Posts; User: scooty199

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    Re: Problem with NullPointerException?

    Ah, I wasn't thinking that. I'll try that. Thanks.

    And thank you javapenguin.
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    Re: Problem with NullPointerException?

    I've also tested the first if statement, if it's true it'll come up with a box saying created. So it does create it.
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    Re: Problem with NullPointerException?

    Because it order for my program requirements to be met, it had to be instantiated at some point, but the program requirements wouldn't have been met if I just had it set as

    StudentGrades sg = null;
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    Re: Problem with NullPointerException?

    Well, I do have it defined.

    Here's the full code


    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    import java.util.Random;
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    Re: Problem with NullPointerException?

    No, I mean area[0]. I specifically have an array of 8 JTextAreas, used in a JLayeredPane.

    Here's the fields in StudentGUI

    private int[] scores;
    private int[] sorted;
    static JButton[]...
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    Problem with NullPointerException?

    Ok, so I'm working with returning an array in my program, StudentGrades

    In this block, once my button construct is hit... it creates the array


    if(e.getActionCommand().equals("Construct"))...
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    Re: JFrames not coming up?

    I've gotten the JFrames fixed. I entirely eliminated the use of the JFrame array.
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    Re: JFrames not coming up?

    I know I initialized sg. I always hit the construct button before I hit any of the action buttons.

    When I hit my Action 1 button, it gives me a NPE for scores.
    I know scores is set to null, but ...
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    Re: JFrames not coming up?

    Any help at all?
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    Re: JFrames not coming up?

    Alright I got it displaying, now I'm getting a NullPointException at


    scores = sg.getTestGrades();
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    Re: JFrames not coming up?

    I noticed that, and it was fixed. oddly it didn't throw a nullpointer exception.

    And I'll try that e.getActionCommand()
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    Re: JFrames not coming up?

    I added that for all my JFrames, included the inherited one.

    It seems it just sits there when I run, nothing comes up.
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    JFrames not coming up?

    Ok, so I've had my three classes, and nothing seems to be running for me. It compiles well, just my swing components don't appear.

    Here's the code:
    GUI Class

    import java.awt.*;
    import...
  14. [SOLVED] Re: Experiencing a run time error, don't know what the problem is

    I did find my error. I realized in my keyPressed method I should have out the parseInt under the if condition.

    Thanks for the help!
  15. [SOLVED] Experiencing a run time error, don't know what the problem is

    Ok, so in my GUI application, it takes a string and converts it to a number, but there's a problem.

    It generates a run time error

    Here's the cod]
    import java.awt.*;
    import java.awt.event.*;...
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