public static void main(String args[]){

		BytesWritable cv = new BytesWritable();

		String str1 = "1234567";

		String str2 = "123450";

		cv.set(str1.getBytes(), 0, str1.getBytes().length);

		System.out.println(new String(cv.getBytes()));

		cv.set(str2.getBytes(), 0, str2.getBytes().length);

		System.out.println(new String(cv.getBytes()));

	}
output:

1234567

1234507
	public static void main(String args[]){

		BytesWritable cv = new BytesWritable();

		String str1 = "1234567";

		String str2 = "123450";

		cv.set(str1.getBytes(), 0, str1.getBytes().length);

		System.out.println(new String(cv.getBytes()));

		cv.setCapacity(0);

		cv.set(str2.getBytes(), 0, str2.getBytes().length);

		System.out.println(new String(cv.getBytes()));

	}

output:

1234567

123450