Meine Button werden nicht angezeigt

[Robocop1902]

Hallo habe dieses Thema bereits einige male im Forum gelesen komme aber nicht weiter




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

public class ButtonMain extends JFrame {
private static final long serialVersionUID = 2L;

JButton jbnButton1, jbnbutton2;
JTextField jtfInput;
JPanel jplPenal;
public ButtonMain () {
setTitle ("BOGY Button Frame") ;
setSize (50, 50) ;

jtfInput = new JTextField (20);


jbnButton1 = new JButton ("Button 1");
jbnButton1.addActionListener (new ActionListener () {
public void actionPerformed (ActionEvent e) {
jtfInput.setText("Button 2 was selected");
}
});
jbnbutton2 = new JButton ("Button 2");
jbnbutton2.addActionListener (new ActionListener () {

public void actionPerformed (ActionEvent e) {
jtfInput.setText("Button 2 was selected");
}
});
jplPenal =new JPanel () ;
jplPenal.setLayout (new FlowLayout ());
jplPenal.add(jtfInput);
jplPenal.add(jbnButton1);
jplPenal.add(jbnbutton2);


getContentPane () .add(jplPenal, BorderLayout.CENTER);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible (true);





}



public static void main(String[] args) {
// TODO Auto-generated method stub

}

}

[Christian Marquardt]

Die Frage ist wohl falsch gestellt. Es dürfte ja überhaupt nichts passieren

public static void main(String[] args) {
// TODO Auto-generated method stub

}

In deiner Main wird nichts gemacht. Des Weiteren programmiert man das nicht alles in den Konstruktor rein

[highlight=java]

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class ButtonMain extends javax.swing.JFrame
{
private JButton jbnButton1;
private JButton jbnbutton2;
private JTextField jtfInput;
private JPanel jplPanal;

public ButtonMain()
{
initComponents();
}

private void initComponents()
{
setDefaultCloseOperation(WindowConstants.EXIT_ON_C LOSE);
setTitle("BOGY Button Frame");
setSize(500,500);
jbnButton1=new JButton("Button 1");
jbnButton1.addActionListener(new ActionListener()
{

@Override
public void actionPerformed(java.awt.event.ActionEvent e)
{
jtfInput.setText("Button 2 was selected");
}

});

jbnbutton2=new JButton("Button 2");
jbnbutton2.addActionListener(new ActionListener()
{

@Override
public void actionPerformed(java.awt.event.ActionEvent e)
{
jtfInput.setText("Button 2 was selected");
}

});

jtfInput=new JTextField(20);

jplPanal=new JPanel();
jplPanal.setLayout(new FlowLayout());
jplPanal.add(jtfInput);
jplPanal.add(jbnButton1);
jplPanal.add(jbnbutton2);
getContentPane().add(jplPanal,BorderLayout.CENTER) ;

pack();
}

public static void main(String args[])
{
java.awt.EventQueue.invokeLater(new Runnable()
{
public void run()
{
new ButtonMain().setVisible(true);
}

});
}

}


[/highlight]