org.apache.bcel.generic

## Class StackInstruction

- java.lang.Object
- - org.apache.bcel.generic.Instruction
  - - org.apache.bcel.generic.StackInstruction

- All Implemented Interfaces:
    Cloneable
  Direct Known Subclasses:
    DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, POP, POP2, SWAP

      public abstract class StackInstruction
      extends Instruction

  Super class for stack operations like DUP and POP.

- - ### Field Summary

    - ### Fields inherited from class org.apache.bcel.generic.Instruction

      `length, opcode`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `StackInstruction(short opcode)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Type` | `getType(ConstantPoolGen cp)`

    - ### Methods inherited from class org.apache.bcel.generic.Instruction

      `accept, consumeStack, copy, dump, equals, getComparator, getLength, getName, getOpcode, hashCode, initFromFile, isValidByte, isValidShort, produceStack, readInstruction, setComparator, toString, toString, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### StackInstruction

          protected StackInstruction(short opcode)

      Parameters:
        `opcode` - instruction opcode

  - ### Method Detail

    - #### getType

          public Type getType(ConstantPoolGen cp)

      Returns:
        Type.UNKNOWN

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