Find offset and eof file into another file

Good Morning. There is a file, which contains several images inside it. How do I get the byte chain between two points I have. For example:

Bytes of my file

89 50 4E 47 0D 0A 1A 0A 00 00 00 0D 49 48 
44 52 00 00 00 40 00 00 00 40 08 02 00 00 
00 25 0B E6 89 00 00 00 09 70 48 59 73 00 
00 0E C4 00 00 0E 49 45 4E 44 AE 42 60 82

Code Java

byte[] header = new byte[] {(byte) 0x89,
                            (byte) 0x50,
                            (byte) 0x4E,
                            (byte) 0x47,
                            (byte) 0x0D,
                            (byte) 0x0A,
                            (byte) 0x1A};

byte[] endBytes = new byte[] {(byte) 0x49,
                              (byte) 0x45,
                              (byte) 0x4E,
                              (byte) 0x44,
                              (byte) 0xAE,
                              (byte) 0x42,
                              (byte) 0x60,
                              (byte) 0x82};

RandomAccessFile file = new RandomAccessFile("MY FILE", "r");

From this point forward I don't know how to proceed.

How do I get the byte string contained between the header and the endBytes ?

Since Java 7 there is class java.nio.file.Files which has [static] method readAllBytes(). That method has a single parameter which is the path to the file to read and returns a byte[] array that contains the entire file contents. So no need for RandomAccessFile.

You want all the bytes in the file apart from the first seven and the last eight. The following code demonstrates.

/*
 * import java.nio.file.Files;
 * import java.nio.file.Paths;
 */
try {
    byte[] readBytes = Files.readAllBytes(Paths.get("datafile.dat"));
    byte[] requiredBytes = new byte[readBytes.length - 7 - 8];
    System.arraycopy(readBytes, 7, requiredBytes, 0, requiredBytes.length);
}
catch (IOException xIo) {
    xIo.printStackTrace();
}