Javada key events(tuş olayları)

[dede]

main

Kod: (Tümünü Seç)

// Testing KeyDemoFrame.
   import javax.swing.JFrame;

   public class main
   {
      public static void main( String args[] )
      {
         KeyDemoFrame keyDemoFrame = new KeyDemoFrame();
        keyDemoFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        keyDemoFrame.setSize( 350, 100 ); // set frame size
        keyDemoFrame.setVisible( true ); // display frame
     } // end main
  } // end class KeyDemo

KeyDemoFrame

Kod: (Tümünü Seç)

// Demonstrating keystroke events.
  import java.awt.Color;
   import java.awt.event.KeyListener;
  import java.awt.event.KeyEvent;
   import javax.swing.JFrame;
   import javax.swing.JTextArea;

   public class KeyDemoFrame extends JFrame implements KeyListener
  {
     private String line1 = ""; // first line of textarea
     private String line2 = ""; // second line of textarea
     private String line3 = ""; // third line of textarea
     private JTextArea textArea; // textarea to display output

     // KeyDemoFrame constructor
     public KeyDemoFrame()
     {
        super( "Demonstrating Keystroke Events" );

        textArea = new JTextArea( 10, 15 ); // set up JTextArea
        textArea.setText( "Press any key on the keyboard..." );
        textArea.setEnabled( false ); // disable textarea
        textArea.setDisabledTextColor( Color.BLACK ); // set text color
        add( textArea ); // add textarea to JFrame

        addKeyListener( this ); // allow frame to process key events
     } // end KeyDemoFrame constructor
     // handle press of any key
    public void keyPressed( KeyEvent event )
     {
        line1 = String.format( "Key pressed =: %s",
           event.getKeyText( event.getKeyCode() ) ); // output pressed key
        setLines2and3( event ); // set output lines two and three
     } // end method keyPressed
     // handle release of any key
     public void keyReleased( KeyEvent event )
     {
        line1 = String.format( "Key released: %s",
           event.getKeyText( event.getKeyCode() ) ); // output released key
        setLines2and3( event ); // set output lines two and three
     } // end method keyReleased

     // handle press of an action key
     public void keyTyped( KeyEvent event )
     {
        line1 = String.format( "Key typed: %s", event.getKeyChar() );
        setLines2and3( event ); // set output lines two and three
     } // end method keyTyped

     // set second and third lines of output
     private void setLines2and3( KeyEvent event )
     {
        line2 = String.format( "This key is %san action key",
           ( event.isActionKey() ? "" : "not " ) );

        String temp = event.getKeyModifiersText( event.getModifiers() );

        line3 = String.format( "Modifier keys pressed: %s",
           ( temp.equals( "" ) ? "none" : temp ) ); // output modifiers

        textArea.setText( String.format( "%s\n%s\n%s\n",
           line1, line2, line3 ) ); // output three lines of text
     } // end method setLines2and3
  } // end class KeyDemoFrame