# Class ControlFlowGraph

java.lang.Object
org.apache.bcel.verifier.structurals.ControlFlowGraph

public class ControlFlowGraph extends Object
This class represents a control flow graph of a method.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ControlFlowGraph(MethodGen methodGen)`
  A Control Flow Graph; with additional JustIce checks
  `ControlFlowGraph(MethodGen methodGen, boolean enableJustIceCheck)`
  A Control Flow Graph.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `InstructionContext`
  `contextOf(InstructionHandle inst)`
  Returns the InstructionContext of a given instruction.
  `InstructionContext[]`
  `contextsOf(InstructionHandle[] insts)`
  Returns the InstructionContext[] of a given InstructionHandle[], in a naturally ordered manner.
  `InstructionContext[]`
  `getInstructionContexts()`
  Returns an InstructionContext[] with all the InstructionContext instances for the method whose control flow is represented by this ControlFlowGraph (NOT ORDERED!)
  `boolean`
  `isDead(InstructionHandle i)`
  Returns true, if and only if the said instruction is not reachable; that means, if it is not part of this ControlFlowGraph.

  ### Methods inherited from class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### ControlFlowGraph

    public ControlFlowGraph(MethodGen methodGen)
    A Control Flow Graph; with additional JustIce checks
    Parameters:
      `methodGen` - the method generator instance

  - ### ControlFlowGraph

    public ControlFlowGraph(MethodGen methodGen, boolean enableJustIceCheck)
    A Control Flow Graph.
    Parameters:
      `methodGen` - the method generator instance
      `enableJustIceCheck` - if true, additional JustIce checks are performed
    Since:
      6.0

- ## Method Details

  - ### contextOf

    public InstructionContext contextOf(InstructionHandle inst)
    Returns the InstructionContext of a given instruction.

  - ### contextsOf

    public InstructionContext[] contextsOf(InstructionHandle[] insts)
    Returns the InstructionContext[] of a given InstructionHandle[], in a naturally ordered manner.

  - ### getInstructionContexts

    public InstructionContext[] getInstructionContexts()
    Returns an InstructionContext[] with all the InstructionContext instances for the method whose control flow is represented by this ControlFlowGraph (NOT ORDERED!).

  - ### isDead

    public boolean isDead(InstructionHandle i)
    Returns true, if and only if the said instruction is not reachable; that means, if it is not part of this ControlFlowGraph.