下面例項是跳過前10個位元組，從第11個位元組開始讀取

File file = new File("tcp.txt");
        FileInputStream stream = new java.io.FileInputStream(file);
 
        int pos = 10;//從下一個位元組開始讀
        int len = 15;//讀幾個位元組
        stream.skip(pos); //跳過包含pos的位元組數
        byte[] b = new byte[len];
        stream.read(b);
        System.out.print(new String(b));
        stream.close();