Search for a String in RandomAccessFile

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Hi Team, I am trying to find a String "Henry" in a binary file and change the String to a different string. FYI the file is the output of serialisation of an object.

I am new to searching bytes and imagined this code would search for my byte[] and exchange it. But it doesn't come close to working it doesn't even find a match.

{
    byte[] bytesHenry = new String("Henry").getBytes();
    byte[] bytesSwap = new String("Zsswd").getBytes();

    byte[] seekHenry = new byte[bytesHenry.length];

    RandomAccessFile file = new RandomAccessFile(fileString,"rw");

    long filePointer;
    while (seekHenry != null) {
       filePointer = file.getFilePointer();
       file.readFully(seekHenry);
       if (bytesHenry == seekHenry) {
           file.seek(filePointer);
           file.write(bytesSwap);
           break;
       }
     }
}

asked 39 secs ago

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