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import java.awt.BorderLayout;
import java.awt.Component;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass {
public static void main(String[] a) {
JFrame frame = new JFrame("Alignment Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String labels[] = { "--", "----", "--------", "------------" };
JPanel container = new JPanel();
BoxLayout layout = new BoxLayout(container, BoxLayout.Y_AXIS);
container.setLayout(layout);
for (int i = 0; i < labels.length; i++) {
JButton button = new JButton(labels[i]);
button.setAlignmentX(Component.CENTER_ALIGNMENT);
container.add(button);
}
frame.add(container, BorderLayout.CENTER);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
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