Please HELP on Button Click. URGENT Folks.!!!

Question

Folks,
I need some very URGENT help.
When I click a Button,how do I associate this Button clicked with a particular Key?
I am reading data from a Hashtable in the foll.format
Monday Data [ More Info]
Tuesday Data [ More Info]
where :
Data to display is a Label
[More Info] is a JButton.
But I am unable to associate the button clicked with that particular Data.
ie I am unable to link the button clicked with the Key its associated to.
So when I click the 2nd More Info Button,I must be associated with Tuesday Data.
I am not being able to link Button Clicked to its Key Value.
Any one can help me to get the Key Value please?
Or is displayng thru Hashtable not right? Do I need to use some
other collection.
My code is:
public class JPanelDemo extends JFrame{
private JPanel JButtonPanel;
private Hashtable ht = new Hashtable();
Enumeration enum;
String str;
public JPanelDemo() {
JButtonPanel = new JPanel();
Container c = getContentPane();
// Put Data into Table.
ht.put("Monday ", new JButton("More Info"));
ht.put("Tuesday ", new JButton("More Info"));
ht.put("Wednesday ", new JButton("More Info"));
ht.put("Thursday ", new JButton("More Info"));
JButtonPanel.setLayout(new GridLayout(ht.size(),ht.size()) ) ;
// Instantiate ButtonHandler.
ButtonHandler handler = new ButtonHandler();
// Enumerate thru Keys.
enum = ht.keys();
while(enum.hasMoreElements()){
str = (String) enum.nextElement();
JButtonPanel.add(new JLabel(str)); // Key
JButton jB = (JButton)ht.get(str); // Value
JButtonPanel.add(jB);
jB.addActionListener(handler);
c.add(JButtonPanel,BorderLayout.NORTH);
show();
public static void main(String[] args) {
JPanelDemo JPanelDemo1 = new JPanelDemo();
// Inner Class for BUTTON handling.
private class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,
"You Pressed " + e.getActionCommand(),
"I NEED THE KEY VALUE HERE", /* key VALUE required ie Monday,Tuesday..*?
0);
} // End ButtonHandler.
} // End of class

Answer 1

Hi,
i have modified your program to produce the intended results..
Hope this helps!
josh
public class JPanelDemo extends JFrame{
private JPanel JButtonPanel;
private Hashtable ht = new Hashtable();
Enumeration enum;
String str;
public JPanelDemo() {
JButtonPanel = new JPanel();
Container c = getContentPane();
// Put Data into Table.
ht.put("Monday ", new JButton("More Info"));
ht.put("Tuesday ", new JButton("More Info"));
ht.put("Wednesday ", new JButton("More Info"));
ht.put("Thursday ", new JButton("More Info"));
JButtonPanel.setLayout(new GridLayout(ht.size(),ht.size()) ) ;
// Instantiate ButtonHandler.
ButtonHandler handler = new ButtonHandler();
// Enumerate thru Keys.
enum = ht.keys();
while(enum.hasMoreElements()){
str = (String) enum.nextElement();
JButtonPanel.add(new JLabel(str)); // Key
JButton jB = (JButton)ht.get(str); // Value
JButtonPanel.add(jB);
jB.addActionListener(handler);
c.add(JButtonPanel,BorderLayout.NORTH);
show();
public static void main(String[] args) {
JPanelDemo JPanelDemo1 = new JPanelDemo();
public String compare(JButton b){
int i = ht.size();
Enumeration enum1 = ht.keys();
while(enum1.hasMoreElements()){
String str = (String) enum1.nextElement();
JButton jB = (JButton)ht.get(str); // Value
if( jB.equals(b) ){
return str;
return null;
// Inner Class for BUTTON handling.
private class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
JButton b = (JButton)e.getSource();
String s = compare(b);
JOptionPane.showMessageDialog(null,
"You Pressed " + s,
"I NEED THE KEY VALUE HERE",0);
} // End of class