15.

prev next contents

---

iconst_m1

push the integer constant -1

Jasmin Syntax

     iconst_m1 

Stack

Before	After
...	-1
	...

Description

This instruction pushes the int -1 onto the operand stack.

Bytecode

Type	Description
u1	iconst_m1 opcode = 0x02 (2)

See Also

bipush, sipush, ldc, ldc_w, ldc2_w, aconst_null, iconst_<n>, lconst_<l>, fconst_<f>, dconst_<d>

Notes

You could also use bipush -1, sipush -1 or ldc -1 to achieve the same effect, although iconst_m1 is typically more efficient and uses fewer bytes in the bytecode.

---

prev next contents

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