Source Code : Focus Cycle Sample

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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;
  }
}

           
         
    
  

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