Introduce own boolean flag 'pressed' and use it to switch needed behavior

First init all components
Used BorderLayout and CardLayout
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class...

seats[i] = new JButton(String.valueOf(i + 1));
seats[i].addActionListener(this);

public void actionPerformed(ActionEvent ae){
String text = ((JButton) e.getSource()).getText();
//.....

In one loop
for(int i=0;i<Name.length();i++){
ch[i] = Name.charAt(i);
.....
}
for current i , are only defined values ch[0]......ch[i-2]..ch[i-1]...ch[i]
but no ch[i+1] or ch[i+2] ...

Line 8: JPanel titlePanel, buttonPanel, dealerPanel, playerPanel;
Line 68: JPanel playerPanel = new JPanel();
Two declaration of playerPanel? First of them is null!
Line 136:...

http://itextdocs.lowagie.com/examples/com/lowagie/examples/fonts/styles/FontStylePropagation.pdf
http://itextdocs.lowagie.com/tutorial/fonts/styles/index.php

http://java.sun.com/mailers/techtips/corejava/2006/tt0822.html

public void delete(String val) {
current = head.next;
temp = head;
boolean looking = true;
while...

comparecase 11:
x2 = Arreglos.existeValor(a);with public static boolean existeValor(int a[], int valor, boolean v) {
existeValor(a) --->missed valor and v parameters in invocation...

Try yourself.

You are declared panelCenter2, but you still add buttons to panelCenter.

String[] splitPath = line.split("\\\\");

In release 1.4, the focus subsystem was rearchitected.

Use the piece of code. This adds an AWTEventListener to receive all AWTEvents dispatched system-wide that conform to the given eventMask.
...

I working on Windows XP platform, and I am able to get the popup for this JTree.
From api doc java:
public boolean isPopupTrigger()
Note: Popup menus are triggered differently on different...

is $120. Invest this sum in your education.

private void processConnection() throws IOException {
String message = "Connection successful";
...
message = (String) input.readObject(); // read new message
...

Look at Circular Hough Transform, a Java applet demonstration

http://www.markschulze.net/java/hough/index.html

Generics in the Java Programming Language
Gilad Bracha
July 5, 2004
http://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf

class TestTable {

public static void displayCity(City c) {
System.out.println(c.getKey());
} // end displayCity

// Main entry point
public static void main(String[]...

http://penguin.ewu.edu/~trolfe/NaturalMerge/PgmAsg/PgmAsg.html
check and compare
quuba