Focus Cycle Sample

  
import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class FocusCycleSample {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Focus Cycle Sample");

    Container contentPane = frame.getContentPane();
    contentPane.setLayout(new GridLayout(3,3));
    for (int i = 0; i < 8; i++) {
      JButton button = new JButton("" + i);
      contentPane.add(button);
    }

    JPanel panel = new FocusCycleConstrainedJPanel();
    panel.setLayout(new GridLayout(1, 3));
    for (int i = 0; i < 3; i++) {
      JButton button = new JButton("" + (i + 3));
      panel.add(button);
    }
    contentPane.add(panel);

    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

class FocusCycleConstrainedJPanel extends JPanel {
  public boolean isFocusCycleRoot() {
    return true;
  }
}

Related examples in the same category

1.	Button Focus
2.	Focus Traversal Example
3.	Focus Example
4.	Focus Concepts Demo
5.	Track Focus Demo
6.	Focus Traversal Demo
7.	Use this method to determine whether a particular component has the focus
8.	Handling Focus Changes
9.	Requests focus for a component
10.	Requests focus unless the component already has focus

Focus Cycle Sample : Focus « Swing JFC « Java

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