A panel that won't display

Question

I've created a class "highscores" which reads data from XML, i've used it before so this should work... i put all the data into a list and i want to display it in a panel which containts a label.
but somehow the panel isn't visible, i tried a lot of things but it still doesn't work, anyone got tips?
this is the code to attacj & display the panem to it's frame:
private void HighScoresMenuActionPerformed(java.awt.event.ActionEvent evt) {
mContent.removeAll();
Ballkov_Highscores gamePanel = new Ballkov_Highscores();
gamePanel.setFocusable(true);
mContent.add(gamePanel);
setVisible(true);
and this the code of the panel itself:
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.applet.*;
import javax.swing.*;
import java.util.ArrayList;
import java.util.List;
public class Ballkov_Highscores extends JPanel {
List XmlHighscores = new ArrayList();
public Ballkov_Highscores(){
GetHighscores myGetHighscores = new GetHighscores();
XmlHighscores = myGetHighscores.LeesScores("highscores.xml");
JLabel Score_label = new JLabel();
Score_label.setFont(new Font("Century Gothic",1,16));
Score_label.setLocation(10,10);
Score_label.setText(ToString());
JButton Ok_button = new JButton("Terug naar het menu");
Ok_button.setLocation(50,50);
Ballkov_Defaults myDefaults = new Ballkov_Defaults();
Dimension framedimensie = new Dimension(myDefaults.getGAME_BREEDTE(),
myDefaults.getGAME_HOOGTE());
setPreferredSize(framedimensie);
setVisible(true);
public String ToString(){
StringBuffer sb = new StringBuffer();
for(int i=0; i < XmlHighscores.size() ; i++) {
sb.append(((Player)XmlHighscores.get(i)).toString());
sb.append( "\n" );
return sb.toString();
}

Answer 1

This question is off topic for this forum. Please post this in a more appropriate forum like the swing or awt forum.