BytesWritable 存储问题

	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