astore_n : store object reference in local variable <n> : index :

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

Notes

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

See also

astore istore fstore dstore lstore aload iload fload dload lload

Stack

Before	After
objectref	...
...	...

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)