//FocusTraversalExample.java
// Similar to the FocusExample, this class uses the custom AlphaButtonPolicy
// focus traversal policy to navigate another small set of buttons.
//
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class FocusTraversalExample extends JPanel {
public FocusTraversalExample() {
setLayout(new GridLayout(6, 1));
JButton button1 = new JButton("Texas");
JButton button2 = new JButton("Vermont");
JButton button3 = new JButton("Florida");
JButton button4 = new JButton("Alabama");
JButton button5 = new JButton("Minnesota");
JButton button6 = new JButton("California");
setBackground(Color.lightGray);
add(button1);
add(button2);
add(button3);
add(button4);
add(button5);
add(button6);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Alphabetized Button Focus Traversal");
frame.setFocusTraversalPolicy(new AlphaButtonPolicy());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new FocusTraversalExample());
frame.setSize(400, 300);
frame.setVisible(true);
}
}
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