Mega Code Archive
Request Focus inside a window
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import java.awt.AWTEventMulticaster;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class KeyTextComponent extends JComponent {
private ActionListener actionListenerList = null;
public KeyTextComponent() {
setBackground(Color.CYAN);
KeyListener internalKeyListener = new KeyAdapter() {
public void keyPressed(KeyEvent keyEvent) {
if (actionListenerList != null) {
int keyCode = keyEvent.getKeyCode();
String keyText = KeyEvent.getKeyText(keyCode);
ActionEvent actionEvent = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, keyText);
actionListenerList.actionPerformed(actionEvent);
}
}
};
MouseListener internalMouseListener = new MouseAdapter() {
public void mousePressed(MouseEvent mouseEvent) {
requestFocusInWindow();
}
};
addKeyListener(internalKeyListener);
addMouseListener(internalMouseListener);
}
public void addActionListener(ActionListener actionListener) {
actionListenerList = AWTEventMulticaster.add(actionListenerList, actionListener);
}
public void removeActionListener(ActionListener actionListener) {
actionListenerList = AWTEventMulticaster.remove(actionListenerList, actionListener);
}
public boolean isFocusable() {
return true;
}
public static void main(String[] a){
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new KeyTextComponent(), BorderLayout.CENTER);
JTextField field = new JTextField();
field.setText("Click above blank area to request focus");
frame.add(field, BorderLayout.SOUTH);
frame.setSize(300, 100);
frame.setVisible(true);
field.requestFocus();
}
}
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