public boolean isNullCheck ( ) { // Null check blocks must be exception throwers, // and are always empty. (The only kind of non-empty // exception throwing block is one terminated by an ATHROW). if ( ! isExceptionThrower ( ) || getFirstInstruction ( ) != null ) { return false ; } short opcode = exceptionThrower . getInstruction ( ) . getOpcode ( ) ; return nullCheckInstructionSet . get ( opcode ) ; }
Return whether or not this block is a null check .