putfield_quick

Set field in object

Bytecode

Type Description
u1 putfield_quick opcode = 0xCF (207)
u1 index
u1 unused

Stack ..., objectref, value => ...

Description The objectref, which must be of type reference, and value, which must be a value of a type appropriate for the specified field, are popped from the operand stack. The value is written at offset into the class instance referenced by objectref.

Exception

NullPointerException - objectref is null

Notes

The opcode of this instruction was originally putfield, operating on a field determined dynamically to have an offset into the class instance data of 255 words or less and to have a width of one word.

When the constant pool entry referenced by a putfield instruction is resolved, the offset for the field it references is generated. That offset replaces the first operand byte of the original putfield instruction. The second operand byte of the putfield is unused in putfield_quick.