import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.text.Normalizer;
import java.util.Formatter;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class NormalizerSample1 {
    // がぎぐげご
    private static final String gagi1 = "がぎぐげご";
    private static final String gagi2 = new String(new char[]{'\u304b', '\u3099',
                                                             '\u304d', '\u3099',
                                                             '\u304f', '\u3099',
                                                             '\u3051', '\u3099',
                                                             '\u3053', '\u3099'});


    private Font font = new Font("san-serif", Font.BOLD, 12);
    private GridBagConstraints constraints = new GridBagConstraints();
 
    public NormalizerSample1() {
        JFrame frame = new JFrame();
        JPanel panel = new JPanel();
        GridBagLayout layout = new GridBagLayout();
        constraints.anchor = GridBagConstraints.WEST;
        constraints.weightx = 1.0;
        constraints.weighty = 1.0;
        constraints.ipadx = 10;
        constraints.ipady = 5;
        panel.setLayout(layout);

        showString(panel, layout, "NFC:", Normalizer.normalize(gagi2, Normalizer.Form.NFC));
        showString(panel, layout, "NFD:", Normalizer.normalize(gagi1, Normalizer.Form.NFD));
        showString(panel, layout, "NFKC:", Normalizer.normalize(gagi2, Normalizer.Form.NFKC));
        showString(panel, layout, "NFKD:", Normalizer.normalize(gagi1, Normalizer.Form.NFKD));

        frame.add(panel);
 
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
 
    private void showString(JPanel panel, GridBagLayout layout, String title, String text) {
        constraints.gridwidth = 1;

        JLabel titleLabel = new JLabel(title);
        layout.setConstraints(titleLabel, constraints);
        titleLabel.setFont(font);
        panel.add(titleLabel);

        for (int i = 0; i < text.length(); i++) {
            if (i == text.length() - 1) {
                constraints.gridwidth = GridBagConstraints.REMAINDER;
            }

            Formatter formatter = new Formatter(new StringBuilder());
            JLabel label = new JLabel(formatter.format("%c", text.charAt(i)).toString());
            layout.setConstraints(label, constraints);
            label.setFont(font);
            panel.add(label);
        }

        constraints.gridwidth = 1;

        titleLabel = new JLabel("");
        layout.setConstraints(titleLabel, constraints);
        panel.add(titleLabel);

        for (int i = 0; i < text.length(); i++) {
            if (i == text.length() - 1) {
                constraints.gridwidth = GridBagConstraints.REMAINDER;
            }

            Formatter formatter = new Formatter(new StringBuilder());
            JLabel label = new JLabel(formatter.format("U+%4h", text.charAt(i)).toString());
            layout.setConstraints(label, constraints);
            label.setFont(font);
            panel.add(label);
        }
    }

    public static void main(String[] args) {
        new NormalizerSample1();
    }
}