public boolean startsWith ( byte [ ] prefix ) { if ( ( prefix . length == 0 ) || ( prefix . length > size ( ) ) ) { // no match would be possible return false ; } boolean match = true ; int i = 0 ; int j = this . currentReadPosition ; while ( match && ( i < prefix . length ) ) { if ( this . buffer [ j ] != prefix [ i ] ) { match = false ; } i ++ ; j = ( j + 1 ) % this . buffer . length ; } return match ; }
Tests if the buffer starts with the byte array prefix . The byte array prefix must have a size > = this buffer s size .