this.id = id; instructionList = new ArrayList<InstructionHandle>(); exceptionThrower = null; exceptionGen = null; numIncomingEdges = 0; numOutgoingEdges = 0; }
this.id = id; this.firstInstruction = null; this.lastInstruction = null; this.exceptionThrower = null; this.exceptionGen = null;    this.firstIncomingEdge = null; this.lastIncomingEdge = null; this.firstOutgoingEdge = null; this.lastOutgoingEdge = null; }
    public BasicBlock(int id) {	this.id = id;	instructionList = new ArrayList<InstructionHandle>();	exceptionThrower = null;	exceptionGen = null;	numIncomingEdges = 0;	numOutgoingEdges = 0;    }