public void rm(String sourcePath) {
        File f= new File (sourcePath);
        File f1= new File (Dd+sourcePath);
        if (f1.exists()) {
        	if(f.delete())
        		System.out.println("deleted");
        	else
        		System.out.println("Not deleted");
        }
        else if (f.exists()) {
        	if(f.delete())
        		System.out.println("deleted");
        	else
        		System.out.println("Not deleted");
        }

    }

public Boolean cp(String sourcePath, String destinationPath ) {

		String a="";
		File f =new File(sourcePath);
		File f1= new File (Dd+sourcePath);
		if (f1.exists()) {
			a=Dd+sourcePath;

		}

		else if (f.exists()) {
			a=sourcePath;

		}
		else {
			System.out.println("can't find source to copy");
			return false;
		}

		try {

		FileReader myReader= new FileReader(a);
		File file1= new File(destinationPath);
		File file2= new File(Dd+destinationPath);
		String b;
		if (file2.createNewFile()||file2.exists()) {
			b=Dd+destinationPath;
		}
		else if (file1.createNewFile()||file1.exists()) {
			b=destinationPath;
		}
		else {
			System.out.println("wrong destination path");
			return false;

		}
		FileWriter myWriter= new FileWriter(b);

		Scanner read= new Scanner(myReader);
		String s;
		while (read.hasNextLine()) {
			 s = read.nextLine();
			 myWriter.write(s+"\n");
		}

		myReader.close();
		myWriter.close();
		read.close();
		return true;
		}
		catch(IOException e) {
			System.out.println("wrong input");
			return false;}
	}

	public void mv(String sourcePath, String destinationPath )throws IOException{
	if(cp( sourcePath,  destinationPath ))
		rm(sourcePath);

	}