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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.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Main {
public static void main(String args[]) {
JFrame frame = new JFrame("Key Text Sample");
KeyTextComponent keyTextComponent = new KeyTextComponent();
final JTextField textField = new JTextField();
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
String keyText = actionEvent.getActionCommand();
textField.setText(keyText);
}
};
keyTextComponent.addActionListener(actionListener);
frame.add(keyTextComponent, BorderLayout.CENTER);
frame.add(textField, BorderLayout.SOUTH);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
class KeyTextComponent extends JPanel {
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) {
requestFocus();
}
};
addKeyListener(internalKeyListener);
addMouseListener(internalMouseListener);
}
public void addActionListener(ActionListener actionListener) {
actionListenerList = AWTEventMulticaster.add(actionListenerList,
actionListener);
}
public void removeActionListener(ActionListener actionListener) {
actionListenerList = AWTEventMulticaster.remove(actionListenerList,
actionListener);
}
}
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