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Thread: Image in Java will not display

  1. #1
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    Default Image in Java will not display

    Hello I'm not getting any errors but for some reason my image won't display. Also the picture is a png image. Here is my code that should display the image:

    ImageIcon icon = new ImageIcon("pictures/J Pipe's Card.png");

    imageLabel = new JLabel ( icon );

    add ( imageLabel );


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Image in Java will not display

    Is the image file in the location where the program is looking for it?
    Create a new File("pictures/J Pipe's Card.png") object and print out its absolute path to see where the program is looking for the file.

    What container is the add() method in? Is that container being displayed?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Image in Java will not display

    Quote Originally Posted by Norm View Post
    Is the image file in the location where the program is looking for it?
    Create a new File("pictures/J Pipe's Card.png") object and print out its absolute path to see where the program is looking for the file.

    What container is the add() method in? Is that container being displayed?
    I think it is an addActionListener but I'm not sure.

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    Default Re: Image in Java will not display

    What printed for the location of the image? Was it the correct path?

    What class is the add() method in?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Image in Java will not display

    Quote Originally Posted by Norm View Post
    What printed for the location of the image? Was it the correct path?

    What class is the add() method in?
    I'm not sure but it appears nothing displays and no error. Here is some of my code which includes the lines to display the image, which it doesn't:

    ImageIcon icon = new ImageIcon("J Pipe's Card.png");

    imageLabel = new JLabel ( icon );
    heightLabel = new JLabel ("Height: \n\t");
    widthLabel = new JLabel ( "Width: \n\t");
    areaLabel = new JLabel ( "Area: \n\t");
    costLabel = new JLabel ( "Cost: \n\t");

    ButtonListener listener = new ButtonListener();
    fmt = NumberFormat.getCurrencyInstance();
    height = new JTextField (5);
    width = new JTextField (5);

    calculate = new JButton("Calculate");
    calculate.addActionListener( new ButtonListener());
    // cost.addActionListener ( new PaymentListener());
    //num.addActionListener ( new PaymentListener());
    //rate.addActionListener ( new PaymentListener());

    // add ( imageLabel );
    add ( calculate );

    add (heightLabel);

    add (height);

    add (widthLabel);

    add (width);

    add (areaLabel);

    add (costLabel);

    setPreferredSize ( new Dimension( 500, 250 ));

    setBackground ( Color.cyan );
    }

    --- Update ---

    Also I have a ButtonListener class and an ActionPerformed. Here is the code for those:

    private class ButtonListener implements ActionListener
    {
    //
    // Updates the monthly payment when the button is pushed.
    //

    public void actionPerformed (ActionEvent event)
    {
    double h, w, a, c;
    h = Double.parseDouble(height.getText());
    w = Double.parseDouble(width.getText());
    a = h * w;
    c = a * aRate;

    areaLabel.setText("Area is: " + a );
    costLabel.setText("Cost is: " + fmt.format(c) );

    }
    }

  6. #6
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    Default Re: Image in Java will not display

    Where is the File object I suggested and the print out of the path to make sure the path was right?

    Please edit your post and wrap your code with code tags:
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Image in Java will not display

    Quote Originally Posted by Norm View Post
    Where is the File object I suggested and the print out of the path to make sure the path was right?

    Please edit your post and wrap your code with code tags:
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    I'm not sure what you mean by the File object. The image is a png file and it is in My Pictures. I'm not sure where on my laptop the My Pictures is located, such as the C:/ drive.

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    Default Re: Image in Java will not display

    I'm not sure what you mean by the File object.
    See post #2.

    The print out will show you the path to where the program is looking for the image file.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Image in Java will not display

    Quote Originally Posted by Norm View Post
    See post #2.

    The print out will show you the path to where the program is looking for the image file.
    I tried to run the debugger to see but I can't copy and paste from the debugger. It just says for ImageIcon icon = <object reference> for local variables if that helps any.

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    Default Re: Image in Java will not display

    Is the program finding the image in the place it is looking?
    To see where the program is looking, do what I suggested in post#2
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Image in Java will not display

    This is the exact path, however it gives an error illegal escape character. Is it impossible or something to display an image in Java? I remember I had a project in my Java programming class that involved displaying an image and that didn't work either and I followed the instructions for loading and displaying an image according to the book.

    ImageIcon icon = new ImageIcon("C:\Users\Public\Pictures\J Pipe's Card.png");

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    Default Re: Image in Java will not display

    Try using forward slashes instead of those.

    Yes it is possible to display an image in java.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Image in Java will not display

    Quote Originally Posted by Norm View Post
    Try using forward slashes instead of those.

    Yes it is possible to display an image in java.
    I'm still not sure what is going on. I tried / instead of \ but it still doesn't show the image. Does Java not allow someone to display images made in paint or anything with a png extenstion?

  14. #14
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    Default Re: Image in Java will not display

    First: You have to read the image file to be able to display its contents.
    Then you need to do the right thing in the code to display the image.
    Are you doing the right thing in your code so the image will be displayed? Hard to say without having a version of the code that can be compiled and executed for testing.
    If you don't understand my answer, don't ignore it, ask a question.

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