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

class OutputWindow {

    public static void main(String[] args) {
	JFrame frame = new JFrame("Output");
	frame.setLocation(100,100);

	JTextArea textArea = new JTextArea();
	textArea.setEditable(false);
	textArea.setPreferredSize(new Dimension(50,500));

	frame.add(textArea);
	frame.pack();
	frame.setVisible(true);

	textArea.setText("Testing...\n");
	textArea.append("1... 2... 3...");
    }
}