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Thread: why wony my label show on gui

  1. #1
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    Default why wony my label show on gui

    I am trying to add a label to my gui, i am using the following code but it is not showing.

    Can some one tell what i am doing wrong please

     
    		contentPane = this.getContentPane(); 
    		contentPane.setBackground(Color.GREEN);
    		contentPane.setLayout(null);
     
        JLabel greeting = new JLabel("hello");
        greeting.setFont(new Font("SansSerif", Font.PLAIN, 18));
        contentPane.add(greeting);
        greeting.setVisible(true);


  2. #2
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    Default Re: why wony my label show on gui

    Can you show us an SSCCE instead of an incomplete code snippet?
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    Default Re: why wony my label show on gui

     
     
    public class game extends JFrame{
     
    private JLabel greeting;
     
    	public static void main(String[] args) {
     
    		new game();
     
    	}
     
    	public game() {
     
     
    		contentPane = this.getContentPane(); 
    		contentPane.setBackground(Color.GREEN);
    		contentPane.setLayout(null);
     
            JLabel greeting = new JLabel ("welkom");
            contentPane.add(greeting, BorderLayout.NORTH);
     
      	setResizable(true);
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		setVisible(true);
        }
    }

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: why wony my label show on gui

            contentPane.setLayout(null);    //<<<< Turns OFF layout manager
     
            JLabel greeting = new JLabel ("welkom");
            contentPane.add(greeting, BorderLayout.NORTH);  // sends instructions to layout manager

    There is a conflict in the posted code.
    Which way do you want to go?
    Do your own layout?
    Use the existing layout manager?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: why wony my label show on gui

    use the existing layout.

    i thought i need to add another layout because the label wouldnt show

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    Default Re: why wony my label show on gui

    use the existing layout.
    Then get rid of the call to setLayout()
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: why wony my label show on gui

    Quote Originally Posted by Norm View Post
    Then get rid of the call to setLayout()
    without this
     contentPane.setLayout(null);

    my layout of the rest of my gui goes funny

    --- Update ---

    ive solved it, just needed to set the bounds.

  8. #8
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    Default Re: why wony my label show on gui

    Then this is NOT what you are doing:
    use the existing layout.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: why wony my label show on gui

    Quote Originally Posted by newtolearningjava View Post
    I am trying to add a label to my gui, i am using the following code but it is not showing.

    Can some one tell what i am doing wrong please

     
    		contentPane = this.getContentPane(); 
    		contentPane.setBackground(Color.GREEN);
    		contentPane.setLayout(null);
     
        JLabel greeting = new JLabel("hello");
        greeting.setFont(new Font("SansSerif", Font.PLAIN, 18));
        contentPane.add(greeting);
        greeting.setVisible(true);
    Personally, I don't like using JLabels in the format you used. I would normally use them like this
    JFrame frame = new JFrame();
    frame.set(new JLabel("Hi"));

    but to make the format you used work correctly, i'm assuming you would need to add your jframe name.add(greeting); like this

     
    		contentPane = this.getContentPane(); 
    		contentPane.setBackground(Color.GREEN);
    		contentPane.setLayout(null);
     
        JLabel greeting = new JLabel("hello");
       your jframe name.add(greeting);
        greeting.setFont(new Font("SansSerif", Font.PLAIN, 18));
        contentPane.add(greeting);
        greeting.setVisible(true);

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    Default Re: why wony my label show on gui

    Quote Originally Posted by Leklur View Post
    Personally, I don't like using JLabels in the format you used. I would normally use them like this
    JFrame frame = new JFrame();
    frame.set(new JLabel("Hi"));
    Huh? Can you show us in the API a JFrame.set() method that takes a JLabel as an argument?
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