import javax.imageio.*;
import java.awt.image.*;
import java.awt.event.*;
import java.awt.*;
import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;
import java.lang.management.*;
import java.lang.reflect.*;
import java.net.*;
import java.io.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.*;
import java.util.regex.*;
import java.util.List;
import java.util.zip.*;
import java.util.*;


public class main {
  static int size = 25;
  
  public static void main(String[] args) throws Exception {
    showText_fontSize("Font size: " + size, "Hello\nworld", size);
  }

static void showText_fontSize(String title, String text, int fontSize) {
  JTextArea textArea = new JTextArea(text);
  textArea.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, fontSize));
  makeFrame(title, new JScrollPane(textArea));
}

static void makeFrame(Component content) {
  // TODO: get program ID
  makeFrame("A JavaX Frame", content);
}

static void makeFrame(String title, Component content) {
  JFrame frame = new JFrame(title);
  frame.getContentPane().add(content);
  frame.setBounds(300, 100, 500, 400);
  frame.setVisible(true);
  exitOnFrameClose(frame);
}

  static void exitOnFrameClose(JFrame frame) {
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }

}