import java.io.*;
import javax.swing.*;

/** Matthew Morgenstern,  November 2000
    PrintStream subclasses which support println & print to
    (1) a Textarea of a Swing scrollable JFrame & (2) to a file.  */

  /** Implements OutputStream methods to a GUI Swing TextArea. */
class GuiOutputStream extends OutputStream {
	JTextArea jText;
	public GuiOutputStream(JTextArea jText) {
		super();
		this.jText = jText;	
	}	
	public void close() throws IOException {}
	public void flush() throws IOException {}
	public void write(byte[] b, int off, int len) throws IOException {
        jText.append(new String(b, off, len)); }
	public void write(byte[] b) throws IOException {
	    write(b, 0, b.length-1);}
	public void write(int b) throws IOException {
        jText.append(String.valueOf(b)); }

}
  /** Implements PrintStream to a GUI JFrame scrolling textarea:
  	  Primary Usage: new GuiPrintStream(rows, columns, title)   */
public class GuiPrintStream extends PrintStream {
    JTextArea jText;
    GuiOutputStream gout;
	JScrollPane scroll;
    JFrame topFrame;

	GuiPrintStream(GuiOutputStream gout) {
	    super(gout); //new PrintStream(new GuiOutputStream(jTextArea))
	    this.gout = gout;
	    this.jText = gout.jText;
    }
     /** Creates JFrame w/ scrolling TextArea, rows x columns, & tile: */
    public GuiPrintStream(int rows, int columns, String title) {
		this(new GuiOutputStream(new JTextArea(rows, columns)));
	    scroll = new JScrollPane(jText);  
        topFrame = new JFrame(title);
        topFrame.getContentPane().add(scroll);
        topFrame.pack();
        topFrame.setVisible(true); // this.topframe is JFrame
    }
     /** Usage: PrintStream ps = new GuiPrintStream(); uses defaults */
    public GuiPrintStream () {this(25, 35, "Gui Text Output"); }
     /* Prints Frame's text to PrintStream, eg printFrame(System.out) */
    public void printFrame(PrintStream ps) {
        ps.println(this.jText.getText());
    }
}
  /** Implements PrintStream to a File:
      Usage: new FilePrintStream(filename)  */
class FilePrintStream extends PrintStream {
    FileOutputStream fileout;
    String filename;
    private FilePrintStream(FileOutputStream fileout) {
        super(fileout); // builds PrintStream from OutputStream
        this.fileout = fileout;
        }
      /** Usage: fps = FilePrintStream.create(filename) */
    public static FilePrintStream create(String filename) {
	    FileOutputStream fileout = null;
    	try {fileout = new FileOutputStream(filename);
       		}catch (FileNotFoundException e) {e.printStackTrace();}
		FilePrintStream fps = new FilePrintStream(fileout);
		fps.fileout = fileout;
        return fps;
    }
}

class myOut { // test driver program
	public static void main(String[]args) {
		GuiPrintStream gps =  new GuiPrintStream();
		FilePrintStream fileps = null;
		gps.println(gps);
		gps.println(gps.topFrame);
		gps.println(gps.gout);
		gps.println(gps.jText); 
		gps.print("\n*Second test of inner pane\n");
		gps.println("Third test println to .ps gui.");
		gps.printFrame(System.out);
		fileps = FilePrintStream.create("foo.txt");
		gps.printFrame(fileps);
		}
}