EvilZone

Programming and Scripting => Java => : gh0st July 21, 2011, 05:41:01 AM

: [java]trying to compile this source code
: gh0st July 21, 2011, 05:41:01 AM

:

// Returns the contents of the file in a byte array.
public static byte[] getBytesFromFile(File file) throws IOException {
    InputStream is = new FileInputStream(file);

    // Get the size of the file
    long length = file.length();

    // You cannot create an array using a long type.
    // It needs to be an int type.
    // Before converting to an int type, check
    // to ensure that file is not larger than Integer.MAX_VALUE.
    if (length > Integer.MAX_VALUE) {
        // File is too large
    }

    // Create the byte array to hold the data
    byte[] bytes = new byte[(int)length];

    // Read in the bytes
    int offset = 0;
    int numRead = 0;
    while (offset < bytes.length
           && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {
        offset += numRead;
    }

    // Ensure all the bytes have been read in
    if (offset < bytes.length) {
        throw new IOException("Could not completely read file "+file.getName());
    }

    // Close the input stream and return bytes
    is.close();
    return bytes;
}
thanks to http://www.exampledepot.com/egs/java.io/File2ByteArray.html (http://www.exampledepot.com/egs/java.io/File2ByteArray.html)
 
well first I replace "getBytesFromFile(File file)" how is the correct way to replace that "file file"? example.txt? bin/example.txt?
 
and here? "FileInputStream(file);"

what about here? long length = file.length();"
 
and the header would be java.i/o? any suggestions will be appreciated

: Re: [java]trying to compile this source code
: iMorg July 21, 2011, 05:57:04 AM

What are you replacing it all with. That looks like a finished example.

The function must be called with a File object. since

:

getBytesFromFile(File file)declares the argument as a File object named "file". I think when you create a new file object you just call the File constructor with a string containing the path to the file.

I would use the header java.io.*, unless you are wanting to go for efficiency than only use what you need and call java.io.File.

: Re: [java]trying to compile this source code
: gh0st July 21, 2011, 07:59:11 AM

solved http://www.thenewboston.com/?p=1207&pOpen=tutorial (http://www.thenewboston.com/?p=1207&pOpen=tutorial) Im moving on now to byte stream reading

: Re: [java]trying to compile this source code
: xor July 21, 2011, 02:19:14 PM

Ghost if you have any Java related questions, try and hit me up on the IRC.