Menu
I'm writing bytes to a random access file. After completing the operation, I want to delete the first 100 bytes from the file. How can I achieve this?
Thanks in advance.
650
RandomAccessFile temp = new RandomAccessFile ("temp. tmp", "rw"); temp = new File(NetSimView. filename); temp. delete();
Java RandomAccessFile provides the facility to read and write data to a file. RandomAccessFile works with file as large array of bytes stored in the file system and a cursor using which we can move the file pointer position.
A random access file behaves like a large array of bytes stored in the file system. There is a kind of cursor, or index into the implied array, called the file pointer; input operations read bytes starting at the file pointer and advance the file pointer past the bytes read.
delete() method. In Java, we can delete a file by using the File. delete() method of File class. The delete() method deletes the file or directory denoted by the abstract pathname.
i found a method which provides the desired works. it's deleteRAF and here.
thanks your advices.
154
AFAIK, you will need to copy the remaining bytes (file length - 100) to a new file. Deleting the first 100 bytes from a file is not possible without copying the remaining bytes to a new file.
Edit: As cdhowie rightly pointed out, you could:
Then repeat the process until the entire file is written. Finish off by setting the filelength 100 bytes less than previously. If you want to be on the safe side and not risk corrupting the original file, it could be worth writing to a temp file first.
30
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
