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Thread: ProgramMenuBar problems

  1. #1
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    Unhappy ProgramMenuBar problems

    I'm using the class ProgramMenuBar to make a Menu Bar that has print and will actually print.

    However, while the options are there, they throw Null Pointer Exceptions when selected.

    I have a big program I'm using, but you guys always want something smaller, so:


    import java.awt.color.ColorSpace;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.AdjustmentEvent;
    import java.awt.event.ItemEvent;
    import java.awt.event.ItemListener;
    import java.awt.event.KeyEvent;
    import java.awt.event.MouseEvent;
     
    import javax.swing.event.MenuEvent;
    import javax.swing.event.MenuListener;
    import javax.swing.event.PopupMenuEvent;
    import javax.swing.event.PopupMenuListener;
    import javax.swing.text.DefaultStyledDocument;
     
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
     
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JOptionPane;
    import javax.swing.JPanel;
    import javax.swing.JTextArea;
    import javax.swing.ScrollPaneConstants;
     
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
     
    import java.util.*;
    import java.io.*;
    import javax.swing.ImageIcon;
     
     
    import java.awt.event.WindowEvent;
    import java.awt.Window;
    import javax.swing.JScrollPane;
    import java.awt.Component;
    import javax.swing.JMenu;
    import javax.swing.JMenuItem;
    import acm.io.*;
    import acm.graphics.*;
    import acm.program.*;
    import acm.gui.*;
    import acm.util.*;
    import java.awt.Container;
     
    public class sampleClass extends JFrame
    {
    JPanel panel;
    JMenu menu;
    ProgramMenuBar bar;
     
    public sampleClass()
    {
    setTitle("Title");
    panel = new JPanel();
    bar = new ProgramMenuBar();
    menu = new JMenu();
    panel.add(bar);
    bar.add(menu);
    bar.setVisible(true);
    panel.setVisible(true);
    menu.setVisible(true);
    bar.addFileMenu();
    bar.addFileMenuItems(menu);
    bar.addEditMenu();
    bar.addEditMenuItems(menu);
    bar.init();
     
     
    getContentPane.add(panel);
    }
     
    public static void main(String[] args)
    {
    sampleClass referenceVariable = new sampleClass();
    referenceVariable.showGUI();
    }
     
    public void showGUI(){
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		setSize(300,300);
    		setLocation(100,100);
    		setVisible(true);
    	} 
    }

    How do I get the parts of the menu to work?

    Last edited by javapenguin; July 31st, 2010 at 09:12 AM.


  2. #2
    Administrator copeg's Avatar
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    Default Re: ProgramMenuBar problems

    What is ProgramMenuBar? This isn't part of the standard java library, so I recommend posting its source or library, because without its hard to help debug

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: ProgramMenuBar problems

    Also when posting code, please include all the import statements.

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    Default Re: ProgramMenuBar problems

    Quote Originally Posted by Norm View Post
    Also when posting code, please include all the import statements.
    Ok, I'm going to edit original post rather than just copy and paste and make a new post.

    ProgramMenuBar is from acm.program.

    The acm.program.ProgramMenuBar Class

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    Default Re: ProgramMenuBar problems

    If you'll get rid of the acm packages, then more people could help you. Not everyone has those packages.

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    Default Re: ProgramMenuBar problems

    Well, I have no clue how to make a menu that lets it print. acm will do it, somehow.

    Is there another way...a way that won't involve something very very complex?

  7. #7
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    Default Re: ProgramMenuBar problems


  8. The Following User Says Thank You to copeg For This Useful Post:

    javapenguin (July 31st, 2010)

  9. #8
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    Default Re: ProgramMenuBar problems

    ACM also has a save as feature, and, as most practical programs aren't much good if they can't save, I really would like to know how to make that part work.

  10. #9
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    Default Re: ProgramMenuBar problems

    See #2 and #5

    db

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    Question Re: ProgramMenuBar problems

    Quote Originally Posted by Darryl.Burke View Post
    See #2 and #5

    db
    Ok, but what about saving? Is this a FileSaver class or something?

    Also, my print job won't let me print select pages, say pages 1 -10 of a 20 page document. It only lets my do all the pages.

    So tired, biked at least 16 miles.


    Ok, I fixed the printing dilemma but how do you get it to save something, say a bunch of text fields, or a JTable being used as a sort of database, or just a plain regular file? Can you save a file as .exe?

    Also, how may I ask is it possible for a method, not a method call but a method, to be inside the main method, or any other type of method for that matter? I've seen it and sometimes those programs actually compiled for me. I thought you could have inner classes but not inner methods. Did I learn it wrong?

    Also, why does main have to have a String array as a parameter. Why not just a String, or even a String Vector, or some other variable even?

    Is pretty much every class auto-implementing something, just like every class I make automatically extends Object if I don't tell it to extend something else, which by the way, that other class extends Object or is an ancestor. Speaking of which, what is an Ancestor Listener?

    Is it

    a.) A Listener that, say I push a button in window one and it opens window two; I then do something in window two and the Ancestor Listener makes something happen in window one

    b.) A Listener that will use a Listener of a super class or one of it's ancestors

    c.) A Listener that simply tells which Component called it.

    d.) A Listener that shows your family tree

    e.) A Listener that quite seriously has to do with the Java Tree classes.

    f.) A Listener that somehow involves a JOptionPane and it's parent component.

    g.) None of the above

    h.) More than one of the above (please explain)

    Anyway, does it auto-implement something that requires a main, something not required for some reason for JApplets, method.
    Last edited by javapenguin; July 31st, 2010 at 09:55 PM.

  12. #11
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    Default Re: ProgramMenuBar problems

    Nothing similar about it at all, spammer. Abuse reported on all 11 posts.

    db

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