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import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.plaf.basic.BasicArrowButton;
public class MainClass {
public static void main(final String args[]) {
JFrame frame = new JFrame("Popup JComboBox");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new BasicArrowButton(BasicArrowButton.NORTH), BorderLayout.NORTH);
frame.add(new BasicArrowButton(BasicArrowButton.EAST), BorderLayout.EAST);
frame.add(new BasicArrowButton(BasicArrowButton.SOUTH), BorderLayout.SOUTH);
frame.add(new BasicArrowButton(BasicArrowButton.WEST), BorderLayout.WEST);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
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