Enum Class Opcode

java.lang.Object
java.lang.Enum<OpcodePREVIEW>
java.lang.classfile.Opcode
All Implemented Interfaces:
Serializable, Comparable<OpcodePREVIEW>, Constable
public enum Opcode extends Enum<OpcodePREVIEW>
Opcode is a preview API of the Java platform.
Programs can only use Opcode when preview features are enabled.
Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.
Describes the opcodes of the JVM instruction set, as described in JVMS 6.5. As well as a number of pseudo-instructions that may be encountered when traversing the instructions of a method.
Since:
22
See Also:

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static enum 
    Opcode.KindPREVIEW
    Preview.
    Kinds of opcodes.

    Nested classes/interfaces declared in class java.lang.Enum

    Enum.EnumDesc<E extends Enum<E>>

  • Enum Constant Summary

    Enum Constants
    Enum Constant
    Description
    AALOAD
    Load reference from array
    AASTORE
    Store into reference array
    ACONST_NULL
    Push null
    ALOAD
    Load reference from local variable
    ALOAD_0
    Load reference from local variable 0
    ALOAD_1
    Load reference from local variable 1
    ALOAD_2
    Load reference from local variable 2
    ALOAD_3
    Load reference from local variable 3
    ALOAD_W
    Load reference from local variable (wide index)
    ANEWARRAY
    Create new array of reference
    ARETURN
    Return reference from method
    ARRAYLENGTH
    Get length of array
    ASTORE
    Store reference into local variable
    ASTORE_0
    Store reference into local variable 0
    ASTORE_1
    Store reference into local variable 1
    ASTORE_2
    Store reference into local variable 2
    ASTORE_3
    Store reference into local variable 3
    ASTORE_W
    Store reference into local variable (wide index)
    ATHROW
    Throw exception or error
    BALOAD
    Load byte from array
    BASTORE
    Store into byte array
    BIPUSH
    Push byte
    CALOAD
    Load char from array
    CASTORE
    Store into char array
    CHECKCAST
    Check whether object is of given type
    D2F
    Convert double to float
    D2I
    Convert double to int
    D2L
    Convert double to long
    DADD
    Add double
    DALOAD
    Load double from array
    DASTORE
    Store into double array
    DCMPG
    Compare double
    DCMPL
    Compare double
    DCONST_0
    Push double constant 0
    DCONST_1
    Push double constant 1
    DDIV
    Divide double
    DLOAD
    Load double from local variable
    DLOAD_0
    Load double from local variable 0
    DLOAD_1
    Load double from local variable 1
    DLOAD_2
    Load double from local variable 2
    DLOAD_3
    Load double from local variable 3
    DLOAD_W
    Load double from local variable (wide index)
    DMUL
    Multiply double
    DNEG
    Negate double
    DREM
    Remainder double
    DRETURN
    Return double from method
    DSTORE
    Store double into local variable
    DSTORE_0
    Store double into local variable 0
    DSTORE_1
    Store double into local variable 1
    DSTORE_2
    Store double into local variable 2
    DSTORE_3
    Store double into local variable 3
    DSTORE_W
    Store double into local variable (wide index)
    DSUB
    Subtract double
    DUP
    Duplicate the top operand stack value
    DUP_X1
    Duplicate the top operand stack value and insert two values down
    DUP_X2
    Duplicate the top operand stack value and insert two or three values down
    DUP2
    Duplicate the top one or two operand stack values
    DUP2_X1
    Duplicate the top one or two operand stack values and insert two or three values down
    DUP2_X2
    Duplicate the top one or two operand stack values and insert two, three, or four values down
    F2D
    Convert float to double
    F2I
    Convert float to int
    F2L
    Convert float to long
    FADD
    Add float
    FALOAD
    Load float from array
    FASTORE
    Store into float array
    FCMPG
    Compare float
    FCMPL
    Compare float
    FCONST_0
    Push float constant 0
    FCONST_1
    Push float constant 1
    FCONST_2
    Push float constant 2
    FDIV
    Divide float
    FLOAD
    Load float from local variable
    FLOAD_0
    Load float from local variable 0
    FLOAD_1
    Load float from local variable 1
    FLOAD_2
    Load float from local variable 2
    FLOAD_3
    Load float from local variable 3
    FLOAD_W
    Load float from local variable (wide index)
    FMUL
    Multiply float
    FNEG
    Negate float
    FREM
    Remainder float
    FRETURN
    Return float from method
    FSTORE
    Store float into local variable
    FSTORE_0
    Store float into local variable 0
    FSTORE_1
    Store float into local variable 1
    FSTORE_2
    Store float into local variable 2
    FSTORE_3
    Store float into local variable 3
    FSTORE_W
    Store float into local variable (wide index)
    FSUB
    Subtract float
    GETFIELD
    Fetch field from object
    GETSTATIC
    Get static field from class
    GOTO
    Branch always
    GOTO_W
    Branch always (wide index)
    I2B
    Convert int to byte
    I2C
    Convert int to char
    I2D
    Convert int to double
    I2F
    Convert int to float
    I2L
    Convert int to long
    I2S
    Convert int to short
    IADD
    Add int
    IALOAD
    Load int from array
    IAND
    Boolean AND int
    IASTORE
    Store into int array
    ICONST_0
    Push int constant 0
    ICONST_1
    Push int constant 1
    ICONST_2
    Push int constant 2
    ICONST_3
    Push int constant 3
    ICONST_4
    Push int constant 4
    ICONST_5
    Push int constant 5
    ICONST_M1
    Push int constant -1
    IDIV
    Divide int
    IF_ACMPEQ
    Branch if reference comparison succeeds
    IF_ACMPNE
    Branch if reference comparison succeeds
    IF_ICMPEQ
    Branch if int comparison succeeds
    IF_ICMPGE
    Branch if int comparison succeeds
    IF_ICMPGT
    Branch if int comparison succeeds
    IF_ICMPLE
    Branch if int comparison succeeds
    IF_ICMPLT
    Branch if int comparison succeeds
    IF_ICMPNE
    Branch if int comparison succeeds
    IFEQ
    Branch if int comparison with zero succeeds
    IFGE
    Branch if int comparison with zero succeeds
    IFGT
    Branch if int comparison with zero succeeds
    IFLE
    Branch if int comparison with zero succeeds
    IFLT
    Branch if int comparison with zero succeeds
    IFNE
    Branch if int comparison with zero succeeds
    IFNONNULL
    Branch if reference not null
    IFNULL
    Branch if reference is null
    IINC
    Increment local variable by constant
    IINC_W
    Increment local variable by constant (wide index)
    ILOAD
    Load int from local variable
    ILOAD_0
    Load int from local variable 0
    ILOAD_1
    Load int from local variable 1
    ILOAD_2
    Load int from local variable 2
    ILOAD_3
    Load int from local variable3
    ILOAD_W
    Load int from local variable (wide index)
    IMUL
    Multiply int
    INEG
    Negate int
    INSTANCEOF
    Determine if object is of given type
    INVOKEDYNAMIC
    Invoke a dynamically-computed call site
    INVOKEINTERFACE
    Invoke interface method
    INVOKESPECIAL
    Invoke instance method; direct invocation of instance initialization methods and methods of the current class and its supertypes
    INVOKESTATIC
    Invoke a class (static) method
    INVOKEVIRTUAL
    Invoke instance method; dispatch based on class
    IOR
    Boolean OR int
    IREM
    Remainder int
    IRETURN
    Return int from method
    ISHL
    Shift left int
    ISHR
    Shift right int
    ISTORE
    Store int into local variable
    ISTORE_0
    Store int into local variable 0
    ISTORE_1
    Store int into local variable 1
    ISTORE_2
    Store int into local variable 2
    ISTORE_3
    Store int into local variable 3
    ISTORE_W
    Store int into local variable (wide index)
    ISUB
    Subtract int
    IUSHR
    Logical shift right int
    IXOR
    Boolean XOR int
    JSR
    Jump subroutine is discontinued opcode
    JSR_W
    Jump subroutine (wide index) is discontinued opcode
    L2D
    Convert long to double
    L2F
    Convert long to float
    L2I
    Convert long to int
    LADD
    Add long
    LALOAD
    Load long from array
    LAND
    Boolean AND long
    LASTORE
    Store into long array
    LCMP
    Compare long
    LCONST_0
    Push long constant 0
    LCONST_1
    Push long constant 1
    LDC
    Push item from run-time constant pool
    LDC_W
    Push item from run-time constant pool (wide index)
    LDC2_W
    Push long or double from run-time constant pool (wide index)
    LDIV
    Divide long
    LLOAD
    Load long from local variable
    LLOAD_0
    Load long from local variable 0
    LLOAD_1
    Load long from local variable 1
    LLOAD_2
    Load long from local variable 2
    LLOAD_3
    Load long from local variable 3
    LLOAD_W
    Load long from local variable (wide index)
    LMUL
    Multiply long
    LNEG
    Negate long
    LOOKUPSWITCH
    Access jump table by key match and jump
    LOR
    Boolean OR long
    LREM
    Remainder long
    LRETURN
    Return long from method
    LSHL
    Shift left long
    LSHR
    Shift right long
    LSTORE
    Store long into local variable
    LSTORE_0
    Store long into local variable 0
    LSTORE_1
    Store long into local variable 1
    LSTORE_2
    Store long into local variable 2
    LSTORE_3
    Store long into local variable 3
    LSTORE_W
    Store long into local variable (wide index)
    LSUB
    Subtract long
    LUSHR
    Logical shift right long
    LXOR
    Boolean XOR long
    MONITORENTER
    Enter monitor for object
    MONITOREXIT
    Exit monitor for object
    MULTIANEWARRAY
    Create new multidimensional array
    NEW
    Create new object
    NEWARRAY
    Create new array
    NOP
    Do nothing
    POP
    Pop the top operand stack value
    POP2
    Pop the top one or two operand stack values
    PUTFIELD
    Set field in object
    PUTSTATIC
    Set static field in class
    RET
    Return from subroutine is discontinued opcode
    RET_W
    Return from subroutine (wide index) is discontinued opcode
    RETURN
    Return void from method
    SALOAD
    Load short from array
    SASTORE
    Store into short array
    SIPUSH
    Push short
    SWAP
    Swap the top two operand stack values
    TABLESWITCH
    Access jump table by index and jump

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    bytecode()
    Returns the opcode value.
    boolean
    isWide()
    Returns true if this is a pseudo-opcode modified by wide opcode.
    Opcode.KindPREVIEW
    kind()
    Returns instruction kind.
    int
    sizeIfFixed()
    Returns size of the instruction in bytes if fixed, or -1 otherwise.
    static OpcodePREVIEW
    valueOf(String name)
    Returns the enum constant of this class with the specified name.
    static OpcodePREVIEW[]
    values()
    Returns an array containing the constants of this enum class, in the order they are declared.

    Methods declared in class java.lang.Enum

    clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    Methods declared in class java.lang.Object

    getClass, notify, notifyAll, wait, wait, wait

  • Enum Constant Details

    • NOP

      public static final OpcodePREVIEW NOP
      Do nothing

    • ACONST_NULL

      public static final OpcodePREVIEW ACONST_NULL
      Push null

    • ICONST_M1

      public static final OpcodePREVIEW ICONST_M1
      Push int constant -1

    • ICONST_0

      public static final OpcodePREVIEW ICONST_0
      Push int constant 0

    • ICONST_1

      public static final OpcodePREVIEW ICONST_1
      Push int constant 1

    • ICONST_2

      public static final OpcodePREVIEW ICONST_2
      Push int constant 2

    • ICONST_3

      public static final OpcodePREVIEW ICONST_3
      Push int constant 3

    • ICONST_4

      public static final OpcodePREVIEW ICONST_4
      Push int constant 4

    • ICONST_5

      public static final OpcodePREVIEW ICONST_5
      Push int constant 5

    • LCONST_0

      public static final OpcodePREVIEW LCONST_0
      Push long constant 0

    • LCONST_1

      public static final OpcodePREVIEW LCONST_1
      Push long constant 1

    • FCONST_0

      public static final OpcodePREVIEW FCONST_0
      Push float constant 0

    • FCONST_1

      public static final OpcodePREVIEW FCONST_1
      Push float constant 1

    • FCONST_2

      public static final OpcodePREVIEW FCONST_2
      Push float constant 2

    • DCONST_0

      public static final OpcodePREVIEW DCONST_0
      Push double constant 0

    • DCONST_1

      public static final OpcodePREVIEW DCONST_1
      Push double constant 1

    • BIPUSH

      public static final OpcodePREVIEW BIPUSH
      Push byte

    • SIPUSH

      public static final OpcodePREVIEW SIPUSH
      Push short

    • LDC

      public static final OpcodePREVIEW LDC
      Push item from run-time constant pool

    • LDC_W

      public static final OpcodePREVIEW LDC_W
      Push item from run-time constant pool (wide index)

    • LDC2_W

      public static final OpcodePREVIEW LDC2_W
      Push long or double from run-time constant pool (wide index)

    • ILOAD

      public static final OpcodePREVIEW ILOAD
      Load int from local variable

    • LLOAD

      public static final OpcodePREVIEW LLOAD
      Load long from local variable

    • FLOAD

      public static final OpcodePREVIEW FLOAD
      Load float from local variable

    • DLOAD

      public static final OpcodePREVIEW DLOAD
      Load double from local variable

    • ALOAD

      public static final OpcodePREVIEW ALOAD
      Load reference from local variable

    • ILOAD_0

      public static final OpcodePREVIEW ILOAD_0
      Load int from local variable 0

    • ILOAD_1

      public static final OpcodePREVIEW ILOAD_1
      Load int from local variable 1

    • ILOAD_2

      public static final OpcodePREVIEW ILOAD_2
      Load int from local variable 2

    • ILOAD_3

      public static final OpcodePREVIEW ILOAD_3
      Load int from local variable3

    • LLOAD_0

      public static final OpcodePREVIEW LLOAD_0
      Load long from local variable 0

    • LLOAD_1

      public static final OpcodePREVIEW LLOAD_1
      Load long from local variable 1

    • LLOAD_2

      public static final OpcodePREVIEW LLOAD_2
      Load long from local variable 2

    • LLOAD_3

      public static final OpcodePREVIEW LLOAD_3
      Load long from local variable 3

    • FLOAD_0

      public static final OpcodePREVIEW FLOAD_0
      Load float from local variable 0

    • FLOAD_1

      public static final OpcodePREVIEW FLOAD_1
      Load float from local variable 1

    • FLOAD_2

      public static final OpcodePREVIEW FLOAD_2
      Load float from local variable 2

    • FLOAD_3

      public static final OpcodePREVIEW FLOAD_3
      Load float from local variable 3

    • DLOAD_0

      public static final OpcodePREVIEW DLOAD_0
      Load double from local variable 0

    • DLOAD_1

      public static final OpcodePREVIEW DLOAD_1
      Load double from local variable 1

    • DLOAD_2

      public static final OpcodePREVIEW DLOAD_2
      Load double from local variable 2

    • DLOAD_3

      public static final OpcodePREVIEW DLOAD_3
      Load double from local variable 3

    • ALOAD_0

      public static final OpcodePREVIEW ALOAD_0
      Load reference from local variable 0

    • ALOAD_1

      public static final OpcodePREVIEW ALOAD_1
      Load reference from local variable 1

    • ALOAD_2

      public static final OpcodePREVIEW ALOAD_2
      Load reference from local variable 2

    • ALOAD_3

      public static final OpcodePREVIEW ALOAD_3
      Load reference from local variable 3

    • IALOAD

      public static final OpcodePREVIEW IALOAD
      Load int from array

    • LALOAD

      public static final OpcodePREVIEW LALOAD
      Load long from array

    • FALOAD

      public static final OpcodePREVIEW FALOAD
      Load float from array

    • DALOAD

      public static final OpcodePREVIEW DALOAD
      Load double from array

    • AALOAD

      public static final OpcodePREVIEW AALOAD
      Load reference from array

    • BALOAD

      public static final OpcodePREVIEW BALOAD
      Load byte from array

    • CALOAD

      public static final OpcodePREVIEW CALOAD
      Load char from array

    • SALOAD

      public static final OpcodePREVIEW SALOAD
      Load short from array

    • ISTORE

      public static final OpcodePREVIEW ISTORE
      Store int into local variable

    • LSTORE

      public static final OpcodePREVIEW LSTORE
      Store long into local variable

    • FSTORE

      public static final OpcodePREVIEW FSTORE
      Store float into local variable

    • DSTORE

      public static final OpcodePREVIEW DSTORE
      Store double into local variable

    • ASTORE

      public static final OpcodePREVIEW ASTORE
      Store reference into local variable

    • ISTORE_0

      public static final OpcodePREVIEW ISTORE_0
      Store int into local variable 0

    • ISTORE_1

      public static final OpcodePREVIEW ISTORE_1
      Store int into local variable 1

    • ISTORE_2

      public static final OpcodePREVIEW ISTORE_2
      Store int into local variable 2

    • ISTORE_3

      public static final OpcodePREVIEW ISTORE_3
      Store int into local variable 3

    • LSTORE_0

      public static final OpcodePREVIEW LSTORE_0
      Store long into local variable 0

    • LSTORE_1

      public static final OpcodePREVIEW LSTORE_1
      Store long into local variable 1

    • LSTORE_2

      public static final OpcodePREVIEW LSTORE_2
      Store long into local variable 2

    • LSTORE_3

      public static final OpcodePREVIEW LSTORE_3
      Store long into local variable 3

    • FSTORE_0

      public static final OpcodePREVIEW FSTORE_0
      Store float into local variable 0

    • FSTORE_1

      public static final OpcodePREVIEW FSTORE_1
      Store float into local variable 1

    • FSTORE_2

      public static final OpcodePREVIEW FSTORE_2
      Store float into local variable 2

    • FSTORE_3

      public static final OpcodePREVIEW FSTORE_3
      Store float into local variable 3

    • DSTORE_0

      public static final OpcodePREVIEW DSTORE_0
      Store double into local variable 0

    • DSTORE_1

      public static final OpcodePREVIEW DSTORE_1
      Store double into local variable 1

    • DSTORE_2

      public static final OpcodePREVIEW DSTORE_2
      Store double into local variable 2

    • DSTORE_3

      public static final OpcodePREVIEW DSTORE_3
      Store double into local variable 3

    • ASTORE_0

      public static final OpcodePREVIEW ASTORE_0
      Store reference into local variable 0

    • ASTORE_1

      public static final OpcodePREVIEW ASTORE_1
      Store reference into local variable 1

    • ASTORE_2

      public static final OpcodePREVIEW ASTORE_2
      Store reference into local variable 2

    • ASTORE_3

      public static final OpcodePREVIEW ASTORE_3
      Store reference into local variable 3

    • IASTORE

      public static final OpcodePREVIEW IASTORE
      Store into int array

    • LASTORE

      public static final OpcodePREVIEW LASTORE
      Store into long array

    • FASTORE

      public static final OpcodePREVIEW FASTORE
      Store into float array

    • DASTORE

      public static final OpcodePREVIEW DASTORE
      Store into double array

    • AASTORE

      public static final OpcodePREVIEW AASTORE
      Store into reference array

    • BASTORE

      public static final OpcodePREVIEW BASTORE
      Store into byte array

    • CASTORE

      public static final OpcodePREVIEW CASTORE
      Store into char array

    • SASTORE

      public static final OpcodePREVIEW SASTORE
      Store into short array

    • POP

      public static final OpcodePREVIEW POP
      Pop the top operand stack value

    • POP2

      public static final OpcodePREVIEW POP2
      Pop the top one or two operand stack values

    • DUP

      public static final OpcodePREVIEW DUP
      Duplicate the top operand stack value

    • DUP_X1

      public static final OpcodePREVIEW DUP_X1
      Duplicate the top operand stack value and insert two values down

    • DUP_X2

      public static final OpcodePREVIEW DUP_X2
      Duplicate the top operand stack value and insert two or three values down

    • DUP2

      public static final OpcodePREVIEW DUP2
      Duplicate the top one or two operand stack values

    • DUP2_X1

      public static final OpcodePREVIEW DUP2_X1
      Duplicate the top one or two operand stack values and insert two or three values down

    • DUP2_X2

      public static final OpcodePREVIEW DUP2_X2
      Duplicate the top one or two operand stack values and insert two, three, or four values down

    • SWAP

      public static final OpcodePREVIEW SWAP
      Swap the top two operand stack values

    • IADD

      public static final OpcodePREVIEW IADD
      Add int

    • LADD

      public static final OpcodePREVIEW LADD
      Add long

    • FADD

      public static final OpcodePREVIEW FADD
      Add float

    • DADD

      public static final OpcodePREVIEW DADD
      Add double

    • ISUB

      public static final OpcodePREVIEW ISUB
      Subtract int

    • LSUB

      public static final OpcodePREVIEW LSUB
      Subtract long

    • FSUB

      public static final OpcodePREVIEW FSUB
      Subtract float

    • DSUB

      public static final OpcodePREVIEW DSUB
      Subtract double

    • IMUL

      public static final OpcodePREVIEW IMUL
      Multiply int

    • LMUL

      public static final OpcodePREVIEW LMUL
      Multiply long

    • FMUL

      public static final OpcodePREVIEW FMUL
      Multiply float

    • DMUL

      public static final OpcodePREVIEW DMUL
      Multiply double

    • IDIV

      public static final OpcodePREVIEW IDIV
      Divide int

    • LDIV

      public static final OpcodePREVIEW LDIV
      Divide long

    • FDIV

      public static final OpcodePREVIEW FDIV
      Divide float

    • DDIV

      public static final OpcodePREVIEW DDIV
      Divide double

    • IREM

      public static final OpcodePREVIEW IREM
      Remainder int

    • LREM

      public static final OpcodePREVIEW LREM
      Remainder long

    • FREM

      public static final OpcodePREVIEW FREM
      Remainder float

    • DREM

      public static final OpcodePREVIEW DREM
      Remainder double

    • INEG

      public static final OpcodePREVIEW INEG
      Negate int

    • LNEG

      public static final OpcodePREVIEW LNEG
      Negate long

    • FNEG

      public static final OpcodePREVIEW FNEG
      Negate float

    • DNEG

      public static final OpcodePREVIEW DNEG
      Negate double

    • ISHL

      public static final OpcodePREVIEW ISHL
      Shift left int

    • LSHL

      public static final OpcodePREVIEW LSHL
      Shift left long

    • ISHR

      public static final OpcodePREVIEW ISHR
      Shift right int

    • LSHR

      public static final OpcodePREVIEW LSHR
      Shift right long

    • IUSHR

      public static final OpcodePREVIEW IUSHR
      Logical shift right int

    • LUSHR

      public static final OpcodePREVIEW LUSHR
      Logical shift right long

    • IAND

      public static final OpcodePREVIEW IAND
      Boolean AND int

    • LAND

      public static final OpcodePREVIEW LAND
      Boolean AND long

    • IOR

      public static final OpcodePREVIEW IOR
      Boolean OR int

    • LOR

      public static final OpcodePREVIEW LOR
      Boolean OR long

    • IXOR

      public static final OpcodePREVIEW IXOR
      Boolean XOR int

    • LXOR

      public static final OpcodePREVIEW LXOR
      Boolean XOR long

    • IINC

      public static final OpcodePREVIEW IINC
      Increment local variable by constant

    • I2L

      public static final OpcodePREVIEW I2L
      Convert int to long

    • I2F

      public static final OpcodePREVIEW I2F
      Convert int to float

    • I2D

      public static final OpcodePREVIEW I2D
      Convert int to double

    • L2I

      public static final OpcodePREVIEW L2I
      Convert long to int

    • L2F

      public static final OpcodePREVIEW L2F
      Convert long to float

    • L2D

      public static final OpcodePREVIEW L2D
      Convert long to double

    • F2I

      public static final OpcodePREVIEW F2I
      Convert float to int

    • F2L

      public static final OpcodePREVIEW F2L
      Convert float to long

    • F2D

      public static final OpcodePREVIEW F2D
      Convert float to double

    • D2I

      public static final OpcodePREVIEW D2I
      Convert double to int

    • D2L

      public static final OpcodePREVIEW D2L
      Convert double to long

    • D2F

      public static final OpcodePREVIEW D2F
      Convert double to float

    • I2B

      public static final OpcodePREVIEW I2B
      Convert int to byte

    • I2C

      public static final OpcodePREVIEW I2C
      Convert int to char

    • I2S

      public static final OpcodePREVIEW I2S
      Convert int to short

    • LCMP

      public static final OpcodePREVIEW LCMP
      Compare long

    • FCMPL

      public static final OpcodePREVIEW FCMPL
      Compare float

    • FCMPG

      public static final OpcodePREVIEW FCMPG
      Compare float

    • DCMPL

      public static final OpcodePREVIEW DCMPL
      Compare double

    • DCMPG

      public static final OpcodePREVIEW DCMPG
      Compare double

    • IFEQ

      public static final OpcodePREVIEW IFEQ
      Branch if int comparison with zero succeeds

    • IFNE

      public static final OpcodePREVIEW IFNE
      Branch if int comparison with zero succeeds

    • IFLT

      public static final OpcodePREVIEW IFLT
      Branch if int comparison with zero succeeds

    • IFGE

      public static final OpcodePREVIEW IFGE
      Branch if int comparison with zero succeeds

    • IFGT

      public static final OpcodePREVIEW IFGT
      Branch if int comparison with zero succeeds

    • IFLE

      public static final OpcodePREVIEW IFLE
      Branch if int comparison with zero succeeds

    • IF_ICMPEQ

      public static final OpcodePREVIEW IF_ICMPEQ
      Branch if int comparison succeeds

    • IF_ICMPNE

      public static final OpcodePREVIEW IF_ICMPNE
      Branch if int comparison succeeds

    • IF_ICMPLT

      public static final OpcodePREVIEW IF_ICMPLT
      Branch if int comparison succeeds

    • IF_ICMPGE

      public static final OpcodePREVIEW IF_ICMPGE
      Branch if int comparison succeeds

    • IF_ICMPGT

      public static final OpcodePREVIEW IF_ICMPGT
      Branch if int comparison succeeds

    • IF_ICMPLE

      public static final OpcodePREVIEW IF_ICMPLE
      Branch if int comparison succeeds

    • IF_ACMPEQ

      public static final OpcodePREVIEW IF_ACMPEQ
      Branch if reference comparison succeeds

    • IF_ACMPNE

      public static final OpcodePREVIEW IF_ACMPNE
      Branch if reference comparison succeeds

    • GOTO

      public static final OpcodePREVIEW GOTO
      Branch always

    • JSR

      public static final OpcodePREVIEW JSR
      Jump subroutine is discontinued opcode
      See Also:

    • RET

      public static final OpcodePREVIEW RET
      Return from subroutine is discontinued opcode
      See Also:

    • TABLESWITCH

      public static final OpcodePREVIEW TABLESWITCH
      Access jump table by index and jump

    • LOOKUPSWITCH

      public static final OpcodePREVIEW LOOKUPSWITCH
      Access jump table by key match and jump

    • IRETURN

      public static final OpcodePREVIEW IRETURN
      Return int from method

    • LRETURN

      public static final OpcodePREVIEW LRETURN
      Return long from method

    • FRETURN

      public static final OpcodePREVIEW FRETURN
      Return float from method

    • DRETURN

      public static final OpcodePREVIEW DRETURN
      Return double from method

    • ARETURN

      public static final OpcodePREVIEW ARETURN
      Return reference from method

    • RETURN

      public static final OpcodePREVIEW RETURN
      Return void from method

    • GETSTATIC

      public static final OpcodePREVIEW GETSTATIC
      Get static field from class

    • PUTSTATIC

      public static final OpcodePREVIEW PUTSTATIC
      Set static field in class

    • GETFIELD

      public static final OpcodePREVIEW GETFIELD
      Fetch field from object

    • PUTFIELD

      public static final OpcodePREVIEW PUTFIELD
      Set field in object

    • INVOKEVIRTUAL

      public static final OpcodePREVIEW INVOKEVIRTUAL
      Invoke instance method; dispatch based on class

    • INVOKESPECIAL

      public static final OpcodePREVIEW INVOKESPECIAL
      Invoke instance method; direct invocation of instance initialization methods and methods of the current class and its supertypes

    • INVOKESTATIC

      public static final OpcodePREVIEW INVOKESTATIC
      Invoke a class (static) method

    • INVOKEINTERFACE

      public static final OpcodePREVIEW INVOKEINTERFACE
      Invoke interface method

    • INVOKEDYNAMIC

      public static final OpcodePREVIEW INVOKEDYNAMIC
      Invoke a dynamically-computed call site

    • NEW

      public static final OpcodePREVIEW NEW
      Create new object

    • NEWARRAY

      public static final OpcodePREVIEW NEWARRAY
      Create new array

    • ANEWARRAY

      public static final OpcodePREVIEW ANEWARRAY
      Create new array of reference

    • ARRAYLENGTH

      public static final OpcodePREVIEW ARRAYLENGTH
      Get length of array

    • ATHROW

      public static final OpcodePREVIEW ATHROW
      Throw exception or error

    • CHECKCAST

      public static final OpcodePREVIEW CHECKCAST
      Check whether object is of given type

    • INSTANCEOF

      public static final OpcodePREVIEW INSTANCEOF
      Determine if object is of given type

    • MONITORENTER

      public static final OpcodePREVIEW MONITORENTER
      Enter monitor for object

    • MONITOREXIT

      public static final OpcodePREVIEW MONITOREXIT
      Exit monitor for object

    • MULTIANEWARRAY

      public static final OpcodePREVIEW MULTIANEWARRAY
      Create new multidimensional array

    • IFNULL

      public static final OpcodePREVIEW IFNULL
      Branch if reference is null

    • IFNONNULL

      public static final OpcodePREVIEW IFNONNULL
      Branch if reference not null

    • GOTO_W

      public static final OpcodePREVIEW GOTO_W
      Branch always (wide index)

    • JSR_W

      public static final OpcodePREVIEW JSR_W
      Jump subroutine (wide index) is discontinued opcode
      See Also:

    • ILOAD_W

      public static final OpcodePREVIEW ILOAD_W
      Load int from local variable (wide index)

    • LLOAD_W

      public static final OpcodePREVIEW LLOAD_W
      Load long from local variable (wide index)

    • FLOAD_W

      public static final OpcodePREVIEW FLOAD_W
      Load float from local variable (wide index)

    • DLOAD_W

      public static final OpcodePREVIEW DLOAD_W
      Load double from local variable (wide index)

    • ALOAD_W

      public static final OpcodePREVIEW ALOAD_W
      Load reference from local variable (wide index)

    • ISTORE_W

      public static final OpcodePREVIEW ISTORE_W
      Store int into local variable (wide index)

    • LSTORE_W

      public static final OpcodePREVIEW LSTORE_W
      Store long into local variable (wide index)

    • FSTORE_W

      public static final OpcodePREVIEW FSTORE_W
      Store float into local variable (wide index)

    • DSTORE_W

      public static final OpcodePREVIEW DSTORE_W
      Store double into local variable (wide index)

    • ASTORE_W

      public static final OpcodePREVIEW ASTORE_W
      Store reference into local variable (wide index)

    • RET_W

      public static final OpcodePREVIEW RET_W
      Return from subroutine (wide index) is discontinued opcode
      See Also:

    • IINC_W

      public static final OpcodePREVIEW IINC_W
      Increment local variable by constant (wide index)

  • Method Details

    • values

      public static OpcodePREVIEW[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared

    • valueOf

      public static OpcodePREVIEW valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum class has no constant with the specified name
      NullPointerException - if the argument is null

    • bytecode

      public int bytecode()
      Returns the opcode value. For wide pseudo-opcodes, returns the first 2 bytes of the instruction, which are the wide opcode 196 (0xC4) and the functional opcode, as a U2 value.
      Returns:
      the opcode value

    • isWide

      public boolean isWide()
      Returns true if this is a pseudo-opcode modified by wide opcode.
      Returns:
      true if this is a pseudo-opcode modified by wide opcode
      See Also:

    • sizeIfFixed

      public int sizeIfFixed()
      Returns size of the instruction in bytes if fixed, or -1 otherwise. This size includes the opcode itself.
      Returns:
      size of the instruction in bytes if fixed, or -1 otherwise

    • kind

      public Opcode.KindPREVIEW kind()
      Returns instruction kind.
      Returns:
      instruction kind