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Thread: JLabel

  1. #1
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    Default JLabel

    Hello

    I have a problem... I can't get my JLabel to update.. I have tried Repaint(), revaldiate(), but I think it is something wrong with my connection between my buttons and the JLabel.

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
     
    class Vindu extends JFrame{
     
    	//private JTextField tekstFelt = new JTextField(20);
     
     
    	String teksten = "Dette er min tekst.";
    	public JLabel tekst = new JLabel(teksten);
    	int valg;
     
    	public Vindu(){
    	}
     
    	public Vindu(String tittel){
    		setTitle(tittel);
    		setDefaultCloseOperation(EXIT_ON_CLOSE);
    		setLayout(new FlowLayout());
     
    		Font SS = new Font("SansSerif", Font.BOLD, 12);
    		Font S = new Font("Serif", Font.BOLD, 12);
    		Font M = new Font("Monospaced", Font.BOLD, 12);
    		Font D = new Font("Dialog", Font.BOLD, 12);
     
     
    		JButton SansSerif = new JButton("SansSerif");  // lager knappen
    		SansSerif.setFont(SS);
    		add(SansSerif);  // legger knappen i beholderen
     
        	JButton Serif = new JButton("Serif");
        	Serif.setFont(S);
        	add(Serif);
     
        	JButton Monospaced = new JButton("Monospaced");
        	Monospaced.setFont(M);
        	add(Monospaced);
     
        	JButton Dialog1 = new JButton("Dialog");
        	Dialog1.setFont(D);
        	add(Dialog1);
        	//pack();
     
        	Knappelytter knappelytteren = new Knappelytter(); // lager en lytter
    		SansSerif.addActionListener(knappelytteren); // knytter lytteren til knappen
    		Serif.addActionListener(knappelytteren);
    		Monospaced.addActionListener(knappelytteren);
    		Dialog1.addActionListener(knappelytteren);
     
    		add(tekst);
    		pack();
     
    	}
    }
     
     
    class Knappelytter extends Vindu implements ActionListener{
      	public void actionPerformed(ActionEvent hendelse){
     
    		JButton valgtKnapp = (JButton) hendelse.getSource();
    		String knappeValg = valgtKnapp.getActionCommand(); // getText();
     
    		String font;
    		Font skrift;
    		if(knappeValg.equals("SansSerif")){
    			skrift = new Font("SansSerif", Font.BOLD, 20);
    			tekst.setFont(skrift);
    			tekst.repaint();
    			tekst.revalidate();
    			add(tekst);
    			System.out.println(knappeValg);
    			//font SansSerif
    		}else if(knappeValg.equals("Serif")){
    			skrift = new Font("Serif", Font.BOLD, 20);
    			tekst.setFont(skrift);
    			System.out.println(knappeValg);
    			// font Serif
    		}else if(knappeValg.equals("Monospaced")){
    			skrift = new Font("Monospaced", Font.BOLD, 20);
    			tekst.setFont(skrift);
    			System.out.println(knappeValg);
    			// font Monospaced
    		}else if(knappeValg.equals("Dialog")){
    			skrift = new Font("Dialog", Font.BOLD, 20);
    			tekst.setFont(skrift);
    			System.out.println(knappeValg);
    			// font Dialog
    		}
      	}
    }
     
     
     
     
    class Oppgave1{
    	public static void main(String[]args){
     
    	Vindu etVindu = new Vindu("Et vindu med en knapp");
        	etVindu.setVisible(true);
     
    	}
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: JLabel

    Can you explain what labels are the problem? How to you test the code to show the problem?

  3. #3
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    Default Re: JLabel

    I figured it out

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