FileChinnel 读文件部分数据的问题：报错

@Test
public void test(){
FileInputStream inputStream = null;
    FileChannel inChannel = null;
I  OException exception = null;
    try {
        File file = new File("C://1301.txt");
        inputStream = new FileInputStream(file);
        inChannel = inputStream.getChannel();


        long position = 200;
        inChannel.position(position);
        ByteBuffer buffer = ByteBuffer.allocate(1024);

        while(inChannel.size() > inChannel.position()){
            inChannel.read(buffer);
            buffer.flip();
            System.out.print(new String(buffer.array()));
            buffer.clear();
          }
    } catch (FileNotFoundException e) {
       e.printStackTrace();
       exception = e;
    } catch (IOException e) {
        e.printStackTrace();
        exception = e;
    } finally {
        try {
            if(inputStream != null){
                inputStream.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
            if(exception == null){
                exception = e;
               }
        }
       if(exception != null){
        throw new RuntimeException(exception);
        }
    }

}

问题：描述信息，使用这个方法读取文件的时候，总是少了一部分数据。不知道错在那个地方。换了好几中方法都是不行。

测试的时候文件的大小一定要大于1.5M这样才能看出效果来。如果文件剩余部分小于1M的话。是没有问题的。