46.

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dconst_<d>

push the double 0.0 or 1.0

Jasmin Syntax

     dconst_0 or     dconst_1 

Stack

Before	After
...	<d>-word1
	<d>-word2
	...

Description

dconst_<d> pushes the constant double precision floating point number <d> onto the stack, where <d> is either 0 or 1. For example, to push the double precision float 0.0 onto the stack, use:

     dconst_0 ; push the double 0.0 onto the stack 

Note that you could also use:

     ldc2_w 0.0    ; push the double 0.0 onto the stack 

although this instruction takes more space in the class file and is typically less efficient.

Example

 dconst_0    ; push the double 0.0 onto the stack dconst_1    ; push the double 1.0 onto the stack 

Bytecode

Type	Description
u1	dconst_0 opcode = 0x0E (14)
u1	dconst_1 opcode = 0x0F (15)

See Also

bipush, sipush, ldc, ldc_w, ldc2_w, aconst_null, iconst_m1, iconst_<n>, lconst_<l>, fconst_<f>,

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