With this tutorial we shall show you how to activate a Keystroke when on of the window of out application gains focus.
This is very simple and to do it you have to follows these steps:
- Create a class that extends
AbstractAction. You can bind this action with a certain keystroke if you want. - Create an input device like a
JButton. - Use
getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)to set up the keystroke you want when a window gains focus.
Let’s see the code that follows:
package com.javacodegeeks.snippets.desktop;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class Main {
public static void main(String[] argv) throws Exception {
JButton jButton = new JButton("Button");
AnAction act = new AnAction();
jButton.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("L"),
act.getValue(AnAction.NAME));
}
}
class AnAction extends AbstractAction {
public AnAction() {
super("my action");
}
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("Action performed succesfully");
}
}
This was an example on how to activate a keystroke when the window has focus.
