A, constant

The bytecode mnemonics Instruction meaning
0x00 nop Do nothing
0x01 aconst_null willnullPush to the top of the stack
0x02 iconst_m1 willint 型 - 1Push to the top of the stack
0x03 iconst_0 willint 型 0Push to the top of the stack
0x04 iconst_1 willint 型 1Push to the top of the stack
0x05 iconst_2 willint 型 2Push to the top of the stack
0x06 iconst_3 willint 型 3Push to the top of the stack
0x07 iconst_4 willint 型 4Push to the top of the stack
0x08 iconst_5 willint 型 5Push to the top of the stack
0x09 lconst_0 willlong 型 0Push to the top of the stack
0x0a lconst_1 willlong 型 1Push to the top of the stack
0x0b fconst_0 willfloat 型 0Push to the top of the stack
0x0c fconst_1 willfloat 型 1Push to the top of the stack
0x0d fconst_2 willfloat 型 2Push to the top of the stack
0x0e dconst_0 willdouble 型 0Push to the top of the stack
0x0f dconst_1 willdouble 型 1Push to the top of the stack
0x10 bipush Push constant value of a single byte to the top of the stack128 至 127
0x11 sipush Push a short constant value to the top of the stack32768 至 32767
0x12 Ide willint,float 或 StringType constant values are pushed from the constant pool to the top of the stack
0x13 Idc_w willint,float 或 StringType constant values are pushed from the constant pool to the top of the stack (wide index)
0x14 Idc2_w willlong 或 doubleType constant values are pushed from the constant pool to the top of the stack (wide index)

Second, load,

The bytecode mnemonics Instruction meaning
0x15 iload Specifies theintType local variables pushed to the top of the stack
0x16 lload Specifies thelongType local variables pushed to the top of the stack
0x17 fload Specifies thefloatType local variables pushed to the top of the stack
0x18 dload Specifies thedoubleType local variables pushed to the top of the stack
0x19 aload Pushes the specified reference type local variable to the top of the stack
The bytecode mnemonics Instruction meaning
0x1a iload_0 Will be the first1 个 intType local variables pushed to the top of the stack
0x1b iload_1 Will be the first2 个 intType local variables pushed to the top of the stack
0x1c iload_2 Will be the first3 个 intType local variables pushed to the top of the stack
0x1d iload_3 Will be the first4 个 intType local variables pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x1e lload_0 Will be the first1 个 longType local variables pushed to the top of the stack
0x1f lload_1 Will be the first2 个 longType local variables pushed to the top of the stack
0x20 lload_2 Will be the first3 个 longType local variables pushed to the top of the stack
0x21 lload_3 Will be the first4 个 longType local variables pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x22 fload_0 Will be the first1 个 floatType local variables pushed to the top of the stack
0x23 fload_1 Will be the first2 个 floatType local variables pushed to the top of the stack
0x24 fload_2 Will be the first3 个 floatType local variables pushed to the top of the stack
0x25 fload_3 Will be the first4 个 floatType local variables pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x26 dload_0 Will be the first1 个 doubleType local variables pushed to the top of the stack
0x27 dload_1 Will be the first2 个 doubleType local variables pushed to the top of the stack
0x28 dload_2 Will be the first3 个 doubleType local variables pushed to the top of the stack
0x29 dload_3 Will be the first4 个 doubleType local variables pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x2a aload_0 Will be the first1Two local variables of reference type are pushed to the top of the stack
0x2b aload_1 Will be the first2Two local variables of reference type are pushed to the top of the stack
0x2c aload_2 Will be the first3Two local variables of reference type are pushed to the top of the stack
0x2d aload_3 Will be the first4Two local variables of reference type are pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x2e iaload willintThe specified element of a type array is pushed to the top of the stack
0x2f laload willlongThe specified element of a type array is pushed to the top of the stack
0x30 faload willfloatThe specified element of a type array is pushed to the top of the stack
0x31 daload willdoubleThe specified element of a type array is pushed to the top of the stack
0x32 aaload Pushes the specified element of the array of reference types to the top of the stack
0x33 baload willbooleanType array orbyteThe specified element of a type array is pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x34 caload willcharThe specified element of a type array is pushed to the top of the stack
0x35 saload willshortThe specified element of a type array is pushed to the top of the stack

Three, storage,

The bytecode mnemonics Instruction meaning
0x36 istore The stackintThe type value is stored in the specified local variable
0x37 lstore The stacklongThe type value is stored in the specified local variable
0x38 fstore The stackfloatThe type value is stored in the specified local variable
0x39 dstore The stackdoubleThe type value is stored in the specified local variable
0x3a astore Stores the top of the stack reference type value into the specified local variable
The bytecode mnemonics Instruction meaning
0x3b istore_0 The stackintThe type value is stored in the1Local variables
0x3c istore_1 The stackintThe type value is stored in the2Local variables
0x3d istore_2 The stackintThe type value is stored in the3Local variables
0x3e istore_3 The stackintThe type value is stored in the4Local variables
The bytecode mnemonics Instruction meaning
0x3f lstore_0 The stacklongThe type value is stored in the1Local variables
0x40 lstore_1 The stacklongThe type value is stored in the2Local variables
0x41 lstore_2 The stacklongThe type value is stored in the3Local variables
0x42 lstore_3 The stacklongThe type value is stored in the4Local variables
The bytecode mnemonics Instruction meaning
0x43 fstore_0 The stackfloatThe type value is stored in the1Local variables
0x44 fstore_1 The stackfloatThe type value is stored in the2Local variables
0x45 fstore_2 The stackfloatThe type value is stored in the3Local variables
0x46 fstore_3 The stackfloatThe type value is stored in the4Local variables
The bytecode mnemonics Instruction meaning
0x47 dstore_0 The stackdoubleThe type value is stored in the1Local variables
0x48 dstore_1 The stackdoubleThe type value is stored in the2Local variables
0x49 dstore_2 The stackdoubleThe type value is stored in the3Local variables
0x4a dstore_3 The stackdoubleThe type value is stored in the4Local variables
The bytecode mnemonics Instruction meaning
0x4b astore_0 Store the top of the stack reference type value to no1Local variables
0x4c astore_1 Store the top of the stack reference type value to no2Local variables
0x4d astore_2 Store the top of the stack reference type value to no3Local variables
0x4e astore_3 Store the top of the stack reference type value to no4Local variables
The bytecode mnemonics Instruction meaning
0x4f iastore The stackintThe type value is stored at the specified index position of the specified array
0x50 lastore The stacklongThe type value is stored at the specified index position of the specified array
0x51 fastore The stackfloatThe type value is stored at the specified index position of the specified array
0x52 dastore The stackdoubleThe type value is stored at the specified index position of the specified array
0x53 aastore Stores the top of the stack reference type value to the specified index position of the specified array
0x54 bastore The stackbooleanType value orbyteThe type value is stored at the specified index position of the specified array
0x55 castore The stackcharThe type value is stored at the specified index position of the specified array
0x56 sastore The stackshortThe type value is stored at the specified index position of the specified array

Four, stack

The bytecode mnemonics Instruction meaning
0x57 pop Pop the top value of the stack. Note: the value cannot belong 或 doubleThe type of
0x58 pop2 The one at the top of the stacklong 或 doubleType or two other types of values pop up
0x59 dup Copies the top value of the stack and pushes it to the top
0x5a dup_x1 Copy the top stack value and insert it below the top two values
0x5b dup_x2 Copy the top stack value and insert it below the top two or three values
0x5c dup2 Copy the one at the top of the stacklong 或 doubleType, or two other types of values, and push them to the top of the stack
0x5d dup2_x1 Copy one or two values from the top of the stack and insert them below the top two or three values
0x5e dup2_x2 Copy one or two values from the top of the stack and insert them below the two, three, or four values from the top of the stack
0x5f swap Swap the two values at the top of the stack. Note: values cannot belong 或 doubleThe type of

Five, the mathematical

The bytecode mnemonics Instruction meaning
0x60 iadd The top twointType values are added and pushed to the top of the stack
0x61 ladd The top twolongType values are added and pushed to the top of the stack
0x62 fadd The top twofloatType values are added and pushed to the top of the stack
0x63 dadd The top twodoubleType values are added and pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x64 isub The top twointType values are subtracted and pushed to the top of the stack
0x65 lsub The top twolongType values are subtracted and pushed to the top of the stack
0x66 fsub The top twofloatType values are subtracted and pushed to the top of the stack
0x67 dsub The top twodoubleType values are subtracted and pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x68 imul The top twointType values are multiplied and pushed to the top of the stack
0x69 lmul The top twolongType values are multiplied and pushed to the top of the stack
0x6a fmul The top twofloatType values are multiplied and pushed to the top of the stack
0x6b dmul The top twodoubleType values are multiplied and pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x6c idiv The top twointType divides values and pushes the result to the top of the stack
0x6d ldiv The top twolongType divides values and pushes the result to the top of the stack
0x6e fdiv The top twofloatType divides values and pushes the result to the top of the stack
0x6f ddiv The top twodoubleType divides values and pushes the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x70 irem The top twointType value modulo and push the result to the top of the stack
0x71 lrem The top twolongType value modulo and push the result to the top of the stack
0x72 frem The top twofloatType value modulo and push the result to the top of the stack
0x73 drem The top twodoubleType value modulo and push the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x74 ineg The top twointThe type takes a negative value and pushes the result to the top of the stack
0x75 lneg The top twolongThe type takes a negative value and pushes the result to the top of the stack
0x76 fneg The top twofloatThe type takes a negative value and pushes the result to the top of the stack
0x77 dneg The top twodoubleThe type takes a negative value and pushes the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x78 ishl willintThe type value shifts the specified number of bits left and pushes the result to the top of the stack
0x79 lshl will longThe type value shifts the specified number of bits left and pushes the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x7a ishr willintThe (signed) value of the type shifts the specified number of digits right and pushes the result to the top of the stack
0x7b lshr willlongThe (signed) value of the type shifts the specified number of digits right and pushes the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x7c iushr willintThe (unsigned) value of the type shifts right to specify the number of digits and pushes the result to the top of the stack
0x7d lushr willlongThe (unsigned) value of the type shifts right to specify the number of digits and pushes the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x7e iand The top twointType values perform bitwise and and push the result to the top of the stack
0x7f land The top twolongType values perform bitwise and and push the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x80 ior The top twointType values are “bitwise or” and pushed to the top of the stack
0x81 lor The top twolongType values are “bitwise or” and pushed to the top of the stack
The bytecode mnemonics Instruction meaning
0x82 ixor The top twointType values perform a bitwise xor operation and push the result to the top of the stack
0x83 lxor The top twolongType values perform a bitwise xor operation and push the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x84 iinc Will specifyintA type variable increments the specified value, as ini++,i--,i+=2 等

Six, conversion,

The bytecode mnemonics Instruction meaning
0x85 i2l The stackintType value cast tolongType the value and push the result to the top of the stack
0x86 i2f The stackintType value cast tofloatType the value and push the result to the top of the stack
0x87 i2d The stackintType value cast todoubleType the value and push the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x88 l2i The stacklongType value cast tointType the value and push the result to the top of the stack
0x89 l2f The stacklongType value cast tofloatType the value and push the result to the top of the stack
0x8a l2d The stacklongType value cast todoubleType the value and push the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x8b f2i The stackfloatType value cast tointType the value and push the result to the top of the stack
0x8c f2l The stackfloatType value cast tolongType the value and push the result to the top of the stack
0x8d f2d The stackfloatType value cast todoubleType the value and push the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x8e d2i The stackdoubleType value cast tointType the value and push the result to the top of the stack
0x8f d2l The stackdoubleType value cast tolongType the value and push the result to the top of the stack
0x90 d2f The stackdoubleType value cast tofloatType the value and push the result to the top of the stack
The bytecode mnemonics Instruction meaning
0x91 i2b The stackintType value cast tobyteType the value and push the result to the top of the stack
0x92 i2c The stackintType value cast tocharType the value and push the result to the top of the stack
0x93 i2s The stackintType value cast toshortType the value and push the result to the top of the stack

Seven, comparison,

The bytecode mnemonics Instruction meaning
0x94 lcmp Compare the top two on the stacklongType numeric size and push the result to the top of the stack — value of the result:1,0 和 - 1
The bytecode mnemonics Instruction meaning
0x95 fcmpl Compare the top two on the stackfloatType numeric size and push the result to the top of the stack; When one of the values isNaNWhen will- 1Pressure into the stack
0x96 fcmpg Compare the top two on the stackfloatType numeric size and push the result to the top of the stack; When one of the values isNaNWhen will1Pressure into the stack
The bytecode mnemonics Instruction meaning
0x97 dcmpl Compare the top two on the stackdoubleType numeric size and push the result to the top of the stack; When one of the values isNaNWhen will- 1Pressure into the stack
0x98 dcmpg Compare the top two on the stackdoubleType numeric size and push the result to the top of the stack; When one of the values isNaNWhen will1Pressure into the stack
The bytecode mnemonics Instruction meaning
0x99 ifeq When the stackintThe type value is equal to0When to jump
0x9a ifne When the stackintThe type value does not equal0When to jump
0x9b iflt When the stackintThe type value is less than0When to jump
0x9c ifge When the stackintThe type value is greater than or equal to0When to jump
0x9d ifgt When the stackintType value greater than0When to jump
0x9e ifle When the stackintThe type value is less than or equal to0When to jump
The bytecode mnemonics Instruction meaning
0x9f if_icmpeq Compare the top two on the stackintType value size, jumps when the current equals the latter
0xa0 if_icmpne Compare the top two on the stackintType value size, jump if the current does not equal the latter
0xa1 if_icmplt Compare the top two on the stackintType value size, jump if the current is less than the latter
0xa2 if_icmpge Compare the top two on the stackintType value size, jump if the current is greater than or equal to the latter
0xa3 if_icmpgt Compare the top two on the stackintType value size, jump if the current is greater than the latter
0xa4 if_icmple Compare the top two on the stackintType value size, jump if the current is less than or equal to the latter
The bytecode mnemonics Instruction meaning
0xa5 if_acmpeq Compares values of two reference types at the top of the stack, jumping if the results are equal
0xa6 if_acmpne Compares values of two reference types at the top of the stack, jumping if the results are not equal

Eight, control,

The bytecode mnemonics Instruction meaning
0xa7 goto Unconditional jump
0xa8 jsr Jump to the specified16 位 offsetLocation, and willjsrThe address of the next instruction is pushed to the top of the stack
0xa9 ret Returns the value specified by the local variableindexThe command position, generally andjsr,jsr_wA combination of
The bytecode mnemonics Instruction meaning
0xaa tableswitch Used forswitchConditional jump,caseValue continuous (variable-length instruction)
0xab lookupswitch Used forswitchConditional jump,caseValue discontinuity (variable-length instruction)
The bytecode mnemonics Instruction meaning
0xac ireturn Returns from the current methodint
0xad lreturn Returns from the current methodlong
0xae freturn Returns from the current methodfloat
0xaf dreturn Returns from the current methoddouble
0xb0 areturn Returns an object reference from the current method
0xb1 return Returns from the current methodvoid

Nine, references,

The bytecode mnemonics Instruction meaning
0xb2 getstatic Gets the static field of the specified class and pushes its value to the top of the stack
0xb3 putstatic Assign a static field to the specified class
0xb4 getfield Gets the instance field of the specified class and pushes its value to the top of the stack
0xb5 putfield Assigns a value to the instance field of the specified class
0xb6 invokevirtual Calling instance methods
0xb7 invokespecial Call parent class methods, instance initializer methods, private methods
0xb8 invokestatic Calling static methods
0xb9 invokeinterface Calling interface methods
0xba invokedynamic To call the dynamic linking method, note:Java SE 7Previous versions did not use a value of186opcode
0xbb new Creates an object and pushes its reference to the top of the stack
0xbc newarray Creates an array of the specified primitive type and pushes its reference value to the top of the stack
0xbd anewarray Creates an array of references (such as classes, interfaces, arrays) and pushes its reference values to the top of the stack
0xbe arraylength Get the length of the array and push it to the top of the stack
0xbf athrow Throws the exception at the top of the stack
0xc0 checkcast Check for type conversions. Failure to check is thrownClassCastException
0xc1 instanceof Checks if the object is an instance of the specified class, and if so1Push to the top of the stack, otherwise0Pressure into the stack
The bytecode mnemonics Instruction meaning
0xc2 monitorenter Gets the lock of the object used to implement synchronized blocks
0xc3 monitorexit Release the lock on an object to synchronize the block

Ten, extension,

The bytecode mnemonics Instruction meaning
0xc4 wide Expand the width of a local variable
0xc5 multianewarray Creates a multidimensional array of the specified type and the specified dimension (to execute this instruction, the stack must contain the length values for each dimension) and pushes its reference values to the top of the stack
0xc6 ifnull fornullWhen to jump
0xc7 ifnonnull Don’t fornullWhen to jump
0xc8 goto_w Unconditional jump (wide index)
0xc9 jsr_w Jump to the specified32 位 offsetLocation, and willjsr_wThe address of the next instruction is pushed to the top of the stack

11. Reserve orders

The bytecode mnemonics Instruction meaning
0xca breakpoint A breakpoint marker for debugging
0xfe impdep1 A language backdoor reserved for specific software
0xff impdep2 Language backdoors reserved for specific hardware