import javax.swing.*;

public class Test {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            JFrame frame = new JFrame();
            frame.add(new JLabel("\u3131"));
            frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            frame.pack();
            frame.setVisible(true);
            frame.setLocationRelativeTo(null);
        });
    }
}