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Thread: Can't find Main Class??

  1. #1
    Junior Member zlloyd1's Avatar
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    Question Can't find Main Class??

    I am trying to run the following code on my computer, and it is giving me static, even though I have personally seen this exact code run on my friends computer correctly....
    On my computer it is giving me complaints about not being able to recognize the main class when I try to compile and run the code:
    errorz2.JPG
    As I said, Mark can run this code, without any changes on his laptop, and he gets a box with two buttons in it, but my computer won't even compile the code properly??
    Here is the code, in the hopes that someone can see what is going wrong for me:
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    class SwingApp {
        private JButton action1;
        private JButton action2;
        private JLabel actionLabel;
        SwingApp() {
            // create JFrame container
            JFrame mainFrame = new JFrame( "Example Container Application" );
            mainFrame.setLayout(new FlowLayout());
            // set the initial size
            mainFrame.setSize( 220, 100 );
            // terminate the app when the user exits
            mainFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
            // create button and label
            actionLabel = new JLabel( "This is a label that will change" );
            action1 = new JButton( "action1" );
            action2 = new JButton( "action2" );
            // add action listener for action1 using annonymous inner classes to
            // provide the event handlers when ActionEvent is fired
            action1.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent ae) {
                    actionLabel.setText("action button 1 pressed.");}});
            // same for button 2
            action2.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent ae) {
                    actionLabel.setText("action button 2 pressed.");}});
            // add components to the JFrame container
            mainFrame.add( action1 );
            mainFrame.add( action2 );
            mainFrame.add( actionLabel );
            // make our JFrame visible
            mainFrame.setVisible( true );}}
        public static void main(String[] args) {                    //THE MAIN CLASS IS RIGHT HERE!!
            SwingUtilities.invokeLater( new Runnable() {
                public void run() {
                    new SwingApp();}});}
    Can someone see where I am getting my errors here??


  2. #2
    Super Moderator pbrockway2's Avatar
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    Default Re: Can't find Main Class??

    It would help if you formatted your code more clearly. Use one } per line to end a block, and indent it by the same amount as the line that began the block.

  3. #3
    Administrator copeg's Avatar
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    Default Re: Can't find Main Class??

    Please post the exact error to the forums, and your code is impossible to read - I recommend formatting your code to some sort of human readable style.

  4. #4
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    Default Re: Can't find Main Class??

    Quote Originally Posted by copeg View Post
    some sort of human readable style.
    lmao copeg..

    Your JDE should have an auto format option.

  5. #5
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    Default Re: Can't find Main Class??

    dude....its not a big mistake....
    its just misplace of '}'
    please format your code carefully and you will find it.
    if you still didn't get it.......we are here

  6. #6
    Super Moderator Norm's Avatar
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    Default Re: Can't find Main Class??

    To post readable error messages:
    To copy the contents of the command prompt window:
    Click on Icon in upper left corner
    Select Edit
    Select 'Select All' - The selection will show
    Click in upper left again
    Select Edit and click 'Copy'

    Paste here.
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
    Junior Member zlloyd1's Avatar
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    Default Re: Can't find Main Class??

    Thanks all, but I found my mistake.... I was trying to put this all in a java file named SwingApp.java, when it should have been Application.java. After I named the file correctly, it ran fine, with no errors. I apologize for the confusion, and sloppy formatting of my code, but problem solved, and thanks to all who responded!!

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