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Thread: I am stumped.

  1. #1
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    Angry I am stumped.

    Ok so i created a simple window using swing. The problem I'm having is my .jar file runs fine on my computer, the program opens and does what I want, but when my friends try to open it on their computers it says ("could not find main .class, java will now close.")

    here is my netbeans project.

    First project.rar

    Maybe someone can help me figure this out. Thanks in advance.
    Last edited by Subvoltic; February 23rd, 2012 at 02:02 AM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: I am stumped.

    Please post your source code here in the forum. If it is too big, make a smaller version that compiles and executes and shows the problem.

    when my friends try to open it on their computers
    What are your friends opening? What versions of java do they have? What version of the JDK did you create the program with?

  3. #3
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    Default Re: I am stumped.

    My friends are trying to open, the .jar file, I created with netbean's build button. I had them update their java to the newest version. I am using the newest version of the JDK.

    I have two .class files. Game.class is the main class file. and Window.class is the other one. When they try to run my program, it says "java couldn't find main class Game.class, java will now close." But the program works on my computer.

    Game.class

    import javax.swing.JFrame;
     
    public class Game extends JFrame {
     
        public Game() {
            add(new Window());
            setTitle("Game");
            setDefaultCloseOperation(EXIT_ON_CLOSE);
            setSize(600, 400);
            setLocationRelativeTo(null);
            setVisible(true);
            setResizable(true);
        }
        public static void main(String[] args) {
            Game game = new Game();
        }
    }

    Window.class

    import javax.swing.JPanel;
     
    public class Window extends JPanel {
        public Window() {        
        }
    }

    MAINIFEST

    Manifest-Version: 1.0
    Ant-Version: Apache Ant 1.8.2
    Created-By: 1.7.0_03-b05 (Oracle Corporation)
    Class-Path: lib/swing-layout-1.0.4.jar
    X-COMMENT: Main-Class will be added automatically by build
    Main-Class: Game

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: I am stumped.

    What about the versions of java?
    Are you 1.7 and they are 1.6?

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    Default Re: I am stumped.

    Quote Originally Posted by Norm View Post
    What about the versions of java?
    Are you 1.7 and they are 1.6?
    I'm on the 1.7 JDk and I'm not sure what they are on whatever the newest version of JRE is, thats what they have.

  6. #6
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    Default Re: I am stumped.

    I just figured it out. Yeah i just updated my other computer to the JRE 7 and now it works. Thanks for the help though.

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