import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JComponent;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.text.BadLocationException;
import javax.swing.text.JTextComponent;
public class Main {
public static void main(String[] argv) throws Exception {
JTextField component = new JTextField(10);
// Override letter a
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("typed a"),"actionName");
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke(new Character(' '), 0), "actionName");
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("typed X"), "none");
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("shift pressed SPACE"), "actionName");
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke(new Character(' '), 0), "none");
MyAction action = new MyAction();
component.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("pressed SPACE"),action.getValue(Action.NAME));
component.getActionMap().put(action.getValue(Action.NAME), action);
}
}
class MyAction extends AbstractAction{
public MyAction(){
super("Insert Space");
}
public void actionPerformed(ActionEvent evt) {
JTextComponent c = (JTextComponent) evt.getSource();
try {
c.getDocument().insertString(c.getCaretPosition(), " ", null);
} catch (Exception e) {
e.printStackTrace();
}
}
}