WindowHandler.java

package LoggingImageWindow;

import java.io.OutputStream;
import java.util.logging.LogRecord;
import java.util.logging.StreamHandler;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class WindowHandler extends StreamHandler 
{
	public WindowHandler()
	{
		frame = new JFrame();
		final JTextArea output = new JTextArea();
		output.setEditable(false);
		frame.setSize(200, 200);
		frame.add(new JScrollPane(output));
		frame.setFocusableWindowState(false);
		frame.setVisible(true);
		setOutputStream(new OutputStream() {
			
			public void write(int b) {} //NU se cheama
			public void write(byte[] b, int off, int len)
			{
				output.append(new String(b,off,len));
			}
		});
		
	}
	
	public void publish(LogRecord record)
	{
		if(!frame.isVisible()) return;
		super.publish(record);
		flush();
	}
	private JFrame frame;
}