copiar ficheros de un lugar a otro con java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class CopiarFicheros {
        
        public static void main(String[] args) {

                
                File origen = new File("C:\\Users\\gatu\\Desktop\\prueba.txt");
                File destino = new File("C:\\Users\\gatu\\Desktop\\arbol\\prueba.txt");

                try {
                        InputStream in = new FileInputStream(origen);
                        OutputStream out = new FileOutputStream(destino);
                                
                        byte[] buf = new byte[1024];
                        int len;

                        while ((len = in.read(buf)) > 0) {
                                out.write(buf, 0, len);
                        }
                
                        in.close();
                        out.close();
                } catch (IOException ioe){
                        ioe.printStackTrace();
                }
                

        }

}