IFNULL (Apache Commons BCEL 6.5.0 API)

java.lang.Object
- org.apache.bcel.generic.Instruction
- - org.apache.bcel.generic.BranchInstruction
  - - org.apache.bcel.generic.IfInstruction
    - - org.apache.bcel.generic.IFNULL

All Implemented Interfaces:

java.lang.Cloneable, InstructionTargeter, StackConsumer
```
public class IFNULL
extends IfInstruction
```
IFNULL - Branch if reference is not null
```
Stack: ..., reference -> ...
```

- Field Summary
  - Fields inherited from class org.apache.bcel.generic.BranchInstruction
    index, position, target
  - Fields inherited from class org.apache.bcel.generic.Instruction
    length, opcode
- Constructor Summary
  
  Constructors
  Constructor Description
  
  IFNULL(InstructionHandle target)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void accept(Visitor v)
  Call corresponding visitor method(s).
  
  IfInstruction negate()
  - Methods inherited from class org.apache.bcel.generic.BranchInstruction
    containsTarget, dump, getIndex, getPosition, getTarget, getTargetOffset, getTargetOffset, initFromFile, setIndex, setPosition, setTarget, toString, updatePosition, updateTarget
  - Methods inherited from class org.apache.bcel.generic.Instruction
    consumeStack, copy, equals, getComparator, getLength, getName, getOpcode, hashCode, isValidByte, isValidShort, produceStack, readInstruction, setComparator, toString, toString
  - Methods inherited from class java.lang.Object
    clone, finalize, getClass, notify, notifyAll, wait, wait, wait
  - Methods inherited from interface org.apache.bcel.generic.StackConsumer
    consumeStack

- Constructor Detail
  - IFNULL
```
public IFNULL(InstructionHandle target)
```
- Method Detail
  - negate
```
public IfInstruction negate()
```
    Specified by:
    
    negate in class IfInstruction
    
    Returns:
    
    negation of instruction
  - accept
```
public void accept(Visitor v)
```
    Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
    
    Specified by:
    
    accept in class Instruction
    
    Parameters:
    
    v - Visitor object