Java字节码指令列表
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2011-05-29
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From Wikipedia, the free encyclopedia
Main article: Java bytecode
This is a list of the instructions that make up the the Java bytecode, a hypothetical machine
language that is ultimately executed by the Java virtual machine. The Java bytecode is generated
by language compilers targeting the Java Platform. Most notably the Java programming
language.
Mnemonic
Opcode
(in hex)
Other bytes
Stack
[before]→[after]
Description
A
aaload 32
arrayref, index →
value
loads onto the stack a
reference from an array
aastore 53
arrayref, index,
value →
stores into a reference to
an array
aconst_null 01 → null
pushes a null reference
onto the stack
aload 19 index → objectref
loads a reference onto the
stack from a local variable
#index
aload_0 2a → objectref
loads a reference onto the
stack from local variable 0
aload_1 2b → objectref
loads a reference onto the
stack from local variable 1
aload_2 2c → objectref
loads a reference onto the
stack from local variable 2
aload_3 2d → objectref
loads a reference onto the
stack from local variable 3
anewarray bd
indexbyte1,
indexbyte2
count → arrayref
creates a new array of
references of length count
and component type
identified by the class
reference index
(indexbyte1 << 8 +
indexbyte2) in the
constant pool
areturn b0 objectref → [empty]
returns a reference from a
method
arraylength be arrayref → length
gets the length of an
array
astore 3a index objectref →
stores a reference into a
local variable #index
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