package paket2;

import javax.swing.*;
import javax.swing.border.EtchedBorder;
import java.awt.*;

import static javax.swing.SwingConstants.CENTER;

public class Test3 {

    public static void main(String[] args) {


        JFrame frm = new JFrame();
        JPanel jp = new JPanel();
        jp.setPreferredSize(new Dimension(300,300));// changed it to preferredSize, Thanks!
        frm.getContentPane().add( jp );

        JLabel label = new JLabel();
        label.setText("A");
        label.setFont(new Font(label.getFont().getFontName(), Font.PLAIN, 150));
        label.setHorizontalAlignment(CENTER);
        label.setVerticalAlignment(CENTER);
        label.setVerticalTextPosition(CENTER);

        jp.add(label);
        frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frm.pack();
        frm.setLocationRelativeTo(null);
        frm.setVisible(true);

    }
}