[HaBo]

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.swing.JFrame;
import javax.swing.JProgressBar;


public class Copy {

	public static void main(String[] args) {
		
		JFrame wnd = new JFrame("Kopieren");
		wnd.setSize(300, 50);
		JProgressBar progress = new JProgressBar();
		wnd.add(progress);
		wnd.setLocationRelativeTo(null);
		wnd.setVisible(true);
		progress.setMaximum(1000);
		progress.setValue(0);
		progress.setIndeterminate(false);
		
		try {
			
			File source = new File("Demo.avi");
			long max = source.length();
			long copied = 0;
			
			BufferedInputStream strin = new BufferedInputStream(new FileInputStream("Demo.avi"));
			BufferedOutputStream strout = new BufferedOutputStream(new FileOutputStream("Destination.avi"));
			byte[] buffer = new byte[1024];
			int len;
			while((len = strin.read(buffer)) > -1) {
				strout.write(buffer, 0, len);
				
				// Progressbar
				copied += len;
				int promille = (int) (copied * 1000.0 / max);
				progress.setValue(promille);
			}
			
			strout.flush();
			strin.close();
			strout.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		wnd.dispose();
		
	}

}