dup2 : duplicate top two stack words : index : visitInsn()

Description

Duplicates the top two words on the stack and pushes the duplicates onto the stack in the same order. You can use this to duplicate two single-word items (e.g. two integers, or an integer and an object reference) or one two-word item (i.e. a double or a long).

See also

dup dup_x1 dup2_x1 dup2_x2

Stack

Before	After
word1	word1
word2	word2
...	word1
	word2
	...

Bytecode

Type	Description
u1	dup2 opcode = 0x5C (92)