png - Skip bytes in ByteArray Java -


my app reads png-like file (in byte) , stores bytes bytearray. method use :

public static byte[] read(file file) throws ioexception {          byte []buffer = new byte[(int) file.length()];         inputstream ios = null;         try {             ios = new fileinputstream(file);             if ( ios.read(buffer) == -1 ) {                 throw new ioexception("eof reached while trying read whole file");             }                 } {              try {                  if ( ios != null )                        ios.close();             } catch ( ioexception e) {             }         }          return buffer;     }

after that, want extract patterns of bytearray.

follows pattern of png file :
4 bytes length + 4 bytes types + data (optional) + crc , repeats scheme.

i want while : reading length + type. if i'm not interested of type, want skip chunk. i'm struggling because can't find skip method bytearray[].

does have idea of how proceed ?

have tried use bytearrayinputstream http://docs.oracle.com/javase/7/docs/api/java/io/bytearrayinputstream.html? there skip method


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