Updating a JLabel

[conanzz]

I want to update 0X0 when I press of the "AC Milan" to be "1X0"
and the last scorer also to be updated with the winner;

Also, how to fix the alligenment to the center >>!

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TestSwingListeners1 {
	    public static void main(String[] args) {
        JFrame fr1 = new JFrame("Swing Window");
        Container cp;
       	JButton bt1;
		JButton bt2;
  		int cnt1 = 0;
  		int cnt2 = 0;
  		String scr = null;
  		String wnr = null;
        JButton btOK, btCancel;
		fr1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        fr1.setSize(300, 200);
        fr1.setResizable(false);
        cp = fr1.getContentPane();
        cp.setLayout(new GridLayout(5,1));
	    btOK = new JButton("AC Milan");
        btCancel = new JButton("Real Madrid");
        JLabel lbl1 = new JLabel("Result: " + cnt1 + "X" + cnt2);
		JLabel lbl2 = new JLabel("Last Scorer: " + scr);
		JLabel lbl3 = new JLabel("Winner: " + wnr);
		cp.add(btOK);
        cp.add(btCancel);
		cp.add(lbl1);
		cp.add(lbl2);
		cp.add(lbl3);


		btOK.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent ae) {

			}
		});

		btCancel.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent ae) {

			}
		});
        fr1.show(); // Deprecated method!



		  }
    }

[Majestics]

http://download.oracle.com/javase/tutorial/uiswing/layout/visual.html
These are all the layouts which java have... Check which one fulfill ur requirement.

[JamesCherrill]

In your btOK ActionListener just create a String with the desired text in it and use the label's setText method to update it with that String.

Use setHorizontalAlignment to centre a JLabel's contents inside the JLabel. To centre the JLabel in the window use a Layout Manager (see previous post).

The full documentation is, as always, in the API JavaDoc.

[conanzz]

[Re: Updating a JLabel
In your btOK ActionListener just create a String with the desired text in it and use the label's setText method to update it with that String.

Use setHorizontalAlignment to centre a JLabel's contents inside the JLabel. To centre the JLabel in the window use a Layout Manager (see previous post).

The full documentation is, as always, in the API JavaDoc. ]

Sorry sir I didn`t understand you about making string inside the listener,,
I want to change an integer..!!

[sirlink99]

Sorry sir I didn`t understand you about making string inside the listener,,
I want to change an integer..!!

Yes, yo do want to display an integer, but you want to make it a string

String displayText = "" + number;

and then you want to set that to your JLabel using setText ();

or you can add the integer to a string in the setText();

The listener is there you update your text whenever the desired action is performed.

[conanzz]

The purpose of button is to increment the counter,,
your method will make the change static isnt it ?
or it looks like I misunderstand it ^_

[sirlink99]

you will have to use the static modifier in order to use the variable in the static method. The way I solved this was to move your changing variables out of the main method and instead write this

private static int cnt1;

and then I initialized it in the main. Then you were able to increment the counter using

cnt1 += 1, or cnt1 ++;

Then you set the text and then it updates the label.

[conanzz]

btOK = new JButton("AC Milan");
        btCancel = new JButton("Real Madrid");
        JLabel lbl1 = new JLabel("Result: " + cnt1 + "X" + cnt2);
		JLabel lbl2 = new JLabel("Last Scorer: " + scr);
		JLabel lbl3 = new JLabel("Winner: " + wnr);
		
		cp.add(btOK);
        cp.add(btCancel);
		cp.add(lbl1);
		cp.add(lbl2);
		cp.add(lbl3);
		btOK.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent ae) {
			String displayText = "" + 1;
			
			}
		});

Sorry but I`m confused..
Can you show me how to setText here ??
and Thanks for help ^

[Majestics]

lbl2.setText("");

[conanzz]

would you please restate steps for me !!
I tried these but it has some conflicst

[Majestics]

//when button clicks code then
lbl2.setText(""); // Set Jlabel Title

Please post the errors

[conanzz]

It`s fine my friend I did it ^^ thank you all

[Majestics]

Here the rules are pretty strict , please mark thread solved so others can get advantage of this. :)

[conanzz]

This is the final edit and fixed

btOK.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent ae) {
			cnt1++;	
			lbl1.setText("Result: " + cnt1 + "X" + cnt2);
			lbl2.setText("Last Scorer: AC Milan");
			
			if(cnt1>cnt2){
				lbl3.setText("Winner: AC Milan");
				}
			else if(cnt1<cnt2){
				lbl3.setText("Winner: Real Madrid");
				}
			else if(cnt1 == cnt2){
				lbl3.setText("Winner: Draw");
				}
			}
		});

[conanzz]

Excuse me, but how to mark ir as solved ?

[JamesCherrill]

At the bottom of the thread you should see a heading
Has this thread been answered?
just under that is a link for "Mark this Thread as Solved". Just click it.

[sirlink99]

Move your changing variables outside of your main method

from this:

public static void main (String [] args){
     int cnt1 = 0;
}

to

private static int cnt1; // makes it only visible in this class, and makes it static
public static void main (String [] args){
     cnt1 = 0; // adds value to variable
}

*note: it has to be static in order to use it in a static context

then you want to increment it in the listener

just add this code in for the correct listener

cnt1++; or cnt1 += 1;

this will change the value of the variable by 1.

Then in the listener you want to "refresh" the text by reprinting it using the setText(); on the JLabel. you will then insert the text you want printed into the brackets.

Didn't notice the second page lol. Please mark it as solved as the previous poster suggested.

[a.oprea]

This should do what you asked, but without the alignment

import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
     
    public class TheMain {
    	
    	private static JButton btOK;
		private static JButton btCancel;
		private static int cnt1 = 0, cnt2 = 0;
    	private static JLabel lbl1, lbl2, lbl3;
    	private static String scr, wnr;
    	private static JPanel results;
		
    public static void main(String[] args) {
    JFrame fr1 = new JFrame("Swing Window");
    Container cp;
    
    JButton bt1; // NEVER USED
    JButton bt2; // NEVER USED
    
    scr = null;
    wnr = null;
    
    fr1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    fr1.setSize(300, 200);
    fr1.setResizable(false);
    cp = fr1.getContentPane();
    cp.setLayout(new GridLayout(5,1));
    
    btOK = new JButton("AC Milan");
    btCancel = new JButton("Real Madrid");
    lbl1 = new JLabel("Result: " + cnt1 + "X" + cnt2);
    lbl2 = new JLabel("Last Scorer: " + scr);
    lbl3 = new JLabel("Winner: " + wnr);
    
    cp.add(btOK);
    cp.add(btCancel);
    cp.add(lbl1);
    cp.add(lbl2);
    cp.add(lbl3);
     
     
    btOK.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent ae) {
    	
     if(ae.getSource() == btOK){
    	 cnt1++;
    	 lbl1.setText("Result: " + cnt1 + "X" + cnt2);
    	 
    	 scr = btOK.getText();
    	 lbl2.setText("Last Scorer: " + scr);
     }
    }
    });
     
    btCancel.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent ae) {
     
    }
    });
    fr1.show(); // Deprecated method!
     
     
     
    }
    }

[mKorbel]

setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);