Java KeyAdapter() Constructor
Syntax
KeyAdapter() constructor from KeyAdapter has the following syntax.
public KeyAdapter()
Example
In the following code shows how to use KeyAdapter.KeyAdapter() constructor.
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
/*from w w w .ja v a2 s.c o m*/
import javax.swing.JFrame;
import javax.swing.JTextField;
public class Main {
public static void main(String[] argv) throws Exception {
JTextField component = new JTextField();
component.addKeyListener(new MyKeyListener());
JFrame f = new JFrame();
f.add(component);
f.setSize(300, 300);
f.setVisible(true);
}
}
class MyKeyListener extends KeyAdapter {
public void keyPressed(KeyEvent evt) {
if (evt.getKeyChar() == 'a') {
System.out.println("Check for key characters: " + evt.getKeyChar());
}
if (evt.getKeyCode() == KeyEvent.VK_HOME) {
System.out.println("Check for key codes: " + evt.getKeyCode());
}
}
}
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