Logs

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

public class JTextAreaOutputStream extends OutputStream {

    private StringBuilder sb = new StringBuilder();
    private JTextArea txt = new JTextArea();

    public JTextAreaOutputStream(JTextArea txtArea) {
	this.txt = txtArea;
    }
    
    public void flush() { }

    public void close() { }
    
    public void write(int b) throws IOException {
	
	if (b == '\r') {
	    return;
	}
	
	if (b == '\n') {	    
	    txt.append(sb.toString());
	    sb.setLength(0);	    	    
	}
	
	sb.append((char)b);
	
    }    
    
}

JTextArea text_area = new JTextArea();
out = new PrintStream  ( new JTextAreaOutputStream( txt_area ));