import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
public class main {

static JTextArea ta1, ta2;

public static void main(String[] args) throws Exception {
  showSideBySide("Linked Text Areas",
    withTitle("Left Text", ta1 = newTypeWriterTextArea()),
    withTitle("Right Text", ta2 = newTypeWriterTextArea()));
    
  onUpdate(ta1, new Runnable() {
public void run() { try {

    ta2.setText(ta1.getText());
  
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}});
}


static JComponent withTitle(String title, Component c) {
  return withTitle(withTitle_titlePanel(title), c);
}

static JComponent withTitle_titlePanel(String title) {
  return new JLabel(title);
}

static JPanel withTitle(JComponent titleComponent, Component c) {
  titleComponent.setBorder(BorderFactory.createMatteBorder(0, 0, 1, 0, UIManager.getColor("Button.borderColor")));
  JPanel panel = new JPanel(new BorderLayout());
  panel.setBackground(Color.WHITE);
  panel.add(BorderLayout.NORTH, titleComponent);
  panel.add(BorderLayout.CENTER, wrap(c));
  return panel;
}

static JFrame showSideBySide(String title, Component c1, Component c2) {
  JFrame frame = showFrame(title);
  frame.getContentPane().setLayout(new GridLayout(1, 2));
  frame.getContentPane().add(wrap(c1));
  frame.getContentPane().add(wrap(c2));
  swingUpdate(frame);
  return frame;
}

static void onUpdate(JTextComponent c, final Runnable r) {
  c.getDocument().addDocumentListener(new DocumentListener() {
    public void insertUpdate(DocumentEvent e) {
      r.run();
    }
    public void removeUpdate(DocumentEvent e) {
      r.run();
    }
    public void changedUpdate(DocumentEvent e) {
      r.run();
    }
  });
}
static JTextArea newTypeWriterTextArea() {
  JTextArea textArea = new JTextArea();
  textArea.setFont(new Font("Courier", Font.PLAIN, 14));
  return textArea;
}

static JTextArea newTypeWriterTextArea(String text) {
  JTextArea textArea = newTypeWriterTextArea();
  textArea.setText(text);
  return textArea;
}

static JFrame showFrame() {
  return makeFrame();
}

static JFrame showFrame(Component content) {
  return makeFrame(content);
}

static JFrame showFrame(String title) {
  return makeFrame(title);
}

static JFrame showFrame(String title, Component content) {
  return makeFrame(title, content);
}
static Component wrap(Component c) {
  if (c instanceof JTable || c instanceof JList || c instanceof JTextArea)
    return new JScrollPane(c);
  return c;
}

static void swingUpdate(Component c) {
  c.revalidate();
  c.repaint();
}

static JFrame makeFrame() {
  return makeFrame((Component) null);
}

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

static JFrame makeFrame(String title) {
  return makeFrame(title, null);
}

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