opcode

opcode
opcode	mnemonic symbol	opcode	mnemonic symbol	opcode	mnemonic symbol	opcode	mnemonic symbol
`0`	nop	`64`	lstore_1	`128`	ior	`192`	checkcast
`1`	aconst_null	`65`	lstore_2	`129`	lor	`193`	instanceof
`2`	iconst_m1	`66`	lstore_3	`130`	ixor	`194`	monitorenter
`3`	iconst_0	`67`	fstore_0	`131`	lxor	`195`	monitorexit
`4`	iconst_1	`68`	fstore_1	`132`	iinc	`196`	wide
`5`	iconst_2	`69`	fstore_2	`133`	i2l	`197`	multianewarray
`6`	iconst_3	`70`	fstore_3	`134`	i2f	`198`	ifnull
`7`	iconst_4	`71`	dstore_0	`135`	i2d	`199`	ifnonnull
`8`	iconst_5	`72`	dstore_1	`136`	l2i	`200`	goto_w
`9`	lconst_0	`73`	dstore_2	`137`	l2f	`201`	jsr_w
`10`	lconst_1	`74`	dstore_3	`138`	l2d	`202`	breakpoint
`11`	fconst_0	`75`	astore_0	`139`	f2i	`203`
`12`	fconst_1	`76`	astore_1	`140`	f2l	`204`
`13`	fconst_2	`77`	astore_2	`141`	f2d	`205`
`14`	dconst_0	`78`	astore_3	`142`	d2i	`206`
`15`	dconst_1	`79`	iastore	`143`	d2l	`207`
`16`	bipush	`80`	lastore	`144`	d2f	`208`
`17`	sipush	`81`	fastore	`145`	i2b	`209`
`18`	ldc	`82`	dastore	`146`	i2c	`210`
`19`	ldc_w	`83`	aastore	`147`	i2s	`211`
`20`	ldc2_w	`84`	bastore	`148`	lcmp	`212`
`21`	iload	`85`	castore	`149`	fcmpl	`213`
`22`	lload	`86`	sastore	`150`	fcmpg	`214`
`23`	fload	`87`	pop	`151`	dcmpl	`215`
`24`	dload	`88`	pop2	`152`	dcmpg	`216`
`25`	aload	`89`	dup	`153`	ifeq	`217`
`26`	iload_0	`90`	dup_x1	`154`	ifne	`218`
`27`	iload_1	`91`	dup_x2	`155`	iflt	`219`
`28`	iload_2	`92`	dup2	`156`	ifge	`220`
`29`	iload_3	`93`	dup2_x1	`157`	ifgt	`221`
`30`	lload_0	`94`	dup2_x2	`158`	ifle	`222`
`31`	lload_1	`95`	swap	`159`	if_icmpeq	`223`
`32`	lload_2	`96`	iadd	`160`	if_icmpne	`224`
`33`	lload_3	`97`	ladd	`161`	if_icmplt	`225`
`34`	fload_0	`98`	fadd	`162`	if_icmpge	`226`
`35`	fload_1	`99`	dadd	`163`	if_icmpgt	`227`
`36`	fload_2	`100`	isub	`164`	if_icmple	`228`
`37`	fload_3	`101`	lsub	`165`	if_acmpeq	`229`
`38`	dload_0	`102`	fsub	`166`	if_acmpne	`230`
`39`	dload_1	`103`	dsub	`167`	goto	`231`
`40`	dload_2	`104`	imul	`168`	jsr	`232`
`41`	dload_3	`105`	lmul	`169`	ret	`233`
`42`	aload_0	`106`	fmul	`170`	tableswitch	`234`
`43`	aload_1	`107`	dmul	`171`	lookupswitch	`235`
`44`	aload_2	`108`	idiv	`172`	ireturn	`236`
`45`	aload_3	`109`	ldiv	`173`	lreturn	`237`
`46`	iaload	`110`	fdiv	`174`	freturn	`238`
`47`	laload	`111`	ddiv	`175`	dreturn	`239`
`48`	faload	`112`	irem	`176`	areturn	`240`
`49`	daload	`113`	lrem	`177`	return	`241`
`50`	aaload	`114`	frem	`178`	getstatic	`242`
`51`	baload	`115`	drem	`179`	putstatic	`243`
`52`	caload	`116`	ineg	`180`	getfield	`244`
`53`	saload	`117`	lneg	`181`	putfield	`245`
`54`	istore	`118`	fneg	`182`	invokevirtual	`246`
`55`	lstore	`119`	dneg	`183`	invokespecial	`247`
`56`	fstore	`120`	ishl	`184`	invokestatic	`248`
`57`	dstore	`121`	lshl	`185`	invokeinterface	`249`
`58`	astore	`122`	ishr	`186`	invokedynamic	`250`
`59`	istore_0	`123`	lshr	`187`	new	`251`
`60`	istore_1	`124`	iushr	`188`	newarray	`252`
`61`	istore_2	`125`	lushr	`189`	anewarray	`253`
`62`	istore_3	`126`	iand	`190`	arraylength	`254`	impdep1
`63`	lstore_0	`127`	land	`191`	athrow	`255`	impdep2

The Java Virtual Machine's heap stores all objects created by a running Java application. Objects are created by the new, newarray, anewarray, and multianewarray instructions, but never freed explicitly by the code. Garbage collection is the process of automatically freeing objects that are no longer referenced by the program.

Unlike all other opcodes, method invocations(invokevirtual、invokespecial、invokestatic、invokeinterface、invokedynamic) pops a variable number of entries of the stack!

AllocationInstruction
- new
- newarray
- anewarray
- multianewarray
ArithmeticInstruction
- iadd
- ladd
- fadd
- dadd
- isub
- lsub
- fsub
- dsub
- imul
- lmul
- fmul
- dmul
- idiv
- ldiv
- fdiv
- ddiv
- irem
- lrem
- frem
- drem
- ineg
- lneg
- fneg
- dneg
- ishl
- lshl
- ishr
- lshr
- iushr
- lushr
- iand
- land
- ior
- lor
- ixor
- lxor
- iinc
ArrayInstruction
- iaload
- laload
- faload
- daload
- aaload
- baload
- caload
- saload
- iastore
- lastore
- fastore
- dastore
- aastore
- bastore
- castore
- sastore
CompareInstruction
- lcmp
- fcmpl
- fcmpg
- dcmpl
- dcmpg
ConstantPushInstruction
- aconst_null
- iconst_m1
- iconst_0
- iconst_1
- iconst_2
- iconst_3
- iconst_4
- iconst_5
- lconst_0
- lconst_1
- fconst_0
- fconst_1
- fconst_2
- dconst_0
- dconst_1
- bipush
- sipush
ConversionInstruction
- i2l
- i2f
- i2d
- l2i
- l2f
- l2d
- f2i
- f2l
- f2d
- d2i
- d2l
- d2f
- i2b
- i2c
- i2s
CPInstruction
- ldc
- ldc_w
- ldc2_w
FieldInstruction
- getstatic
- putstatic
- getfield
- putfield
IfInstruction
- ifeq
- ifne
- iflt
- ifge
- ifgt
- ifle
- if_icmpeq
- if_icmpne
- if_icmplt
- if_icmpge
- if_icmpgt
- if_icmple
- if_acmpeq
- if_acmpne
- ifnull
- ifnonnull
InvokeInstruction
- invokevirtual
- invokespecial
- invokestatic
- invokeinterface
- invokedynamic
JumpInstruction
- goto
- goto_w
LocalVariableInstruction
- iload
- lload
- fload
- dload
- aload
- iload_0
- iload_1
- iload_2
- iload_3
- lload_0
- lload_1
- lload_2
- lload_3
- fload_0
- fload_1
- fload_2
- fload_3
- dload_0
- dload_1
- dload_2
- dload_3
- aload_0
- aload_1
- aload_2
- aload_3
- istore
- lstore
- fstore
- dstore
- astore
- istore_0
- istore_1
- istore_2
- istore_3
- lstore_0
- lstore_1
- lstore_2
- lstore_3
- fstore_0
- fstore_1
- fstore_2
- fstore_3
- dstore_0
- dstore_1
- dstore_2
- dstore_3
- astore_0
- astore_1
- astore_2
- astore_3
ReturnInstruction
- ireturn
- lreturn
- freturn
- dreturn
- areturn
- return
SelectInstruction
- tableswitch
- lookupswitch
StackInstruction
- pop
- pop2
- dup
- dup_x1
- dup_x2
- dup2
- dup2_x1
- dup2_x2
- swap
SubroutineInstruction
- jsr
- ret
- jsr_w
XXXInstruction
- nop
- arraylength
- athrow
- checkcast
- instanceof
- monitorenter
- monitorexit
- wide
- impdep1
- impdep2