KeyboardFocusManager class of java

[Gokul20]

Hello friend,

I just started to learn the advanced java class concepts. In which the KeyboardFocusManager class sounds very complicated to use. I am unable to get the use of 'KeyboardFocusManager class' of advanced java programming. I wonder if you provide something about the KeyboardFocusManager class along with proper example. I would greatly appreciate your any help over this java class.

[Modifier]

The KeyboardFocusManager is both a centralized location for client code to query for the focus owner and initiate focus changes, and an event dispatcher for all FocusEvents, WindowEvents related to focus, and KeyEvents. Some browsers partition applets in different code bases into separate contexts, and establish walls between these contexts. In such a scenario, there will be one KeyboardFocusManager per context.

[MindSpace]

Hi,

I suggest you to refer following example of KeyboardFocusManager class of java:

import java.awt.KeyboardFocusManager;
import javax.swing.KeyStroke;

poublic class KeyboardFocusManagerDM {
  public static void main(String[] ardfgs) {
    JFrame aWindow = new JFrame("This is a Border Layout");
    aWindow.setBounds(40, 40, 300, 300);
    aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel pov = new JPanel();

    pov.add(new JTextField(10));
    pov.add(new JTextField(10));
    pov.add(new JTextField(10));
    pov.add(new JTextField(10));
    pov.add(new JTextField(10));
    pov.add(new JTextField(10));
    Set<AWTKeyStroke> set = pov.getFocusTraversalKeys(KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS);
    set = new HashSet(set);
    KeyStroke upov = KeyStroke.getKeyStroke("A");
    set.add(upov);
    System.out.povrintln(set);
   pov.setFocusTraversalKeys(KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, set);

    aWindow.add(pov);

    aWindow.setVisible(true);
  }
}

[Modifier]

Hello friend,

Please review below given some methods of KeyboardFocusManager class:

• setGlobalCurrentFocusCycleRoot(Container newFocusCycleRT)
• upFocusCycle(Component Comp)
• setGlobalPermanentFocusOwner(Component comp)
• setGlobalActiveWindow(Window actWindow)
• redispatchEvent(Component comp, AWTEvent evnt)

[Zecho]

Following example will demonstrate you the use of KeyboardFocusManager class:

import java.awt.KeyboardFocusManager;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class UsingFocuDemo
 {
  public static void main(String[] anl) {
    JFrame frame006 = new JFrame();
    frame006.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTextField textField1 = new JTextField("A TextField");
    KeyboardFocusManager focusManager1 =     KeyboardFocusManager.getCurrentKeyboardFocusManager();
    focusManager.addPropertyChangeListener(new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent e) {
        String prop1 = e.getPropertyName();
        System.out.println(prop1);

      }   }

    frame006.add(textField1, "North");
    frame006.add(new JTextField(), "South");
    frame006.setSize(400, 200);
    frame006.setVisible(true);
  }

}