23.

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astore_<n>

store object reference in local variable <n>

Jasmin Syntax

     astore_0 or     astore_1 or     astore_2 or     astore_3 

Stack

Before	After
objectref	...
...

Description

Pops objectref (a reference to an object or array) off the stack and stores it in local variable <n>, where <n> is 0, 1, 2 or 3. <n> must be a valid local variable number in the current frame.

'astore_<n>' is functionally equivalent to 'astore <n>', although it is typically more efficient and also takes fewer bytes in the bytecode.

Example

 astore_0        ; store reference in local variable 0 astore_1        ; store reference in local variable 1 astore_2        ; store reference in local variable 2 astore_3        ; store reference in local variable 3 

Bytecode

Type	Description
u1	astore_0 opcode = 0x4B (75)
u1	astore_1 opcode = 0x4C (76)
u1	astore_2 opcode = 0x4D (77)
u1	astore_3 opcode = 0x4E (78)

See Also

astore, istore, fstore, dstore, lstore, aload, iload, fload, dload, lload

Notes

astore can also be used to store a returnAddress in a local variable. See the jsr instruction for more details.

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Java Virtual Machine, by Jon Meyer and Troy Downing, O'Reilly Associates