• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Help!!!!!How to add hotkeys into JFrame

 
Greenhorn
Posts: 27
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I need help!!
Now, i want to make an application with several hotKeys in JFrame.My source like this:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.util.*;
public class Demo extends JFrame {
public Demo () {
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
private void jbInit() throws Exception {
this.enableEvents(AWTEvent.KEY_EVENT_MASK);
getContentPane().setLayout(null);
closeBtt.setBounds(new Rectangle(0, 13, 19, 40));
closeBtt.setBorder(new TitledBorder(""));
closeBtt.setHorizontalAlignment(SwingConstants.LEFT);
closeBtt.setHorizontalTextPosition(SwingConstants.LEFT);
closeBtt.setMargin(new Insets(0, 0, 0, 0));
closeBtt.setMnemonic('0');
closeBtt.setText("X");
closeBtt.setVerticalAlignment(SwingConstants.TOP);
closeBtt.setVerticalTextPosition(SwingConstants.TOP);
this.setEnabled(true);
templateLab.setText("template");
templateLab.setBounds(new Rectangle(23, 25, 80, 17));
templateCB.setBounds(new Rectangle(103, 23, 109, 21));
codeLab.setText("name");
codeLab.setBounds(new Rectangle(225, 26, 33, 17));
codeTxt.setBounds(new Rectangle(266, 23, 63, 21));
setBtt.setBounds(new Rectangle(340, 20, 79, 27));
setBtt.setBorder(new TitledBorder(""));
setBtt.setText("set");
getContentPane().add(templateCB, null);
getContentPane().add(codeTxt, null);
getContentPane().add(setBtt, null);
getContentPane().add(closeBtt, null);
getContentPane().add(templateLab, null);
this.getContentPane().add(codeLab, null);
}
protected void processKeyEvent(KeyEvent evt) {
super.processKeyEvent(evt);
if(evt.getKeyCode() == KeyEvent.VK_F4){
System.out.println("AAAA");
}
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(Exception e) {
;
}
Demo demo = new Demo();
demo.setBounds(50,50,479, 80);
demo.show();
}
private JButton closeBtt = new JButton();
private JLabel templateLab = new JLabel();
private JComboBox templateCB = new JComboBox();
private JLabel codeLab = new JLabel();
private JTextField codeTxt = new JTextField();
private JButton setBtt = new JButton();
}
when i clicked the F4 button, i can not catch the KeyEvent. "AAAA" is not printed.
What problem with my program?
help me, plz
thank u

BTW, if i remove all the components from JFrame except label, "AAAA" will be printed.
if possible, give me a demo.
 
Ranch Hand
Posts: 196
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Ok, you shouldn't open several sessions for one and the same topic with the same code inside.
Anyway I compiled your demo and I made a run, at least for me it worked fine. Maybe it is a problem of JDK version? I use java version "1.4.0".
BTW if you register a KeyListener at your JFrame, then you will also catch all key events. It doesn't matter which component has the focus.
 
kim jungil
Greenhorn
Posts: 27
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
i use "1.4.0" too.
but i can not print out "AAAA" anyway
why?
 
Don't get me started about those stupid light bulbs.
reply
    Bookmark Topic Watch Topic
  • New Topic