question: public String toHexString ( final int start , final int length ) { final int roundedStart = ( start / LOG_BYTES_PER_ROW ) * LOG_BYTES_PER_ROW ; final StringBuilder sb = new StringBuilder ( "buffer byte dump\n" ) ; int index = roundedStart ; for ( int nLogged = 0 ; nLogged < length ; nLogged += LOG_BYTES_PER_ROW ) { sb . append ( String . format ( " [%05d-%05d]" , index , index + LOG_BYTES_PER_ROW - 1 ) ) ; for ( int i = 0 ; i < LOG_BYTES_PER_ROW ; ++ i ) { try { final byte b = getByte ( index ++ ) ; sb . append ( String . format ( " 0x%02x" , b ) ) ; } catch ( IndexOutOfBoundsException ioob ) { sb . append ( " <ioob>" ) ; } } sb . append ( '\n' ) ; } return sb . toString ( ) ; }
target:  Return the buffer's byte contents in the form of a hex dump.