Main.java Source code

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Here is the source code for Main.java

Source

import java.awt.Color;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Main extends JPanel {
    public Main() {
        StringBuilder sb = new StringBuilder();
        sb.append("<html><body>");
        sb.append("1");
        sb.append("<sup>");
        sb.append("2");
        sb.append("</sup>");
        sb.append("<font size=+1>/<font size=-1>");
        sb.append("<sub>");
        sb.append("3");
        sb.append("</sub>");
        sb.append("</html></body>");
        JLabel label = new JLabel(sb.toString(), JLabel.CENTER);
        label.setBorder(BorderFactory.createLineBorder(Color.lightGray));
        add(label);
    }

    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new Main());
        f.pack();
        f.setVisible(true);
    }
}