ldc_w

Push item from constant pool (wide index)

Bytecode

Type Description
u1 ldc_w opcode = 0x13 (19)
u2 index

Stack ... => ..., item

Description
ldc_w pushes a one-word constant onto the operand stack. ldc_w takes a single parameter, <value>, which is the value to push. The following Java types can be pushed using ldc_w: int, float, String

Pushing a String causes a reference to a java.lang.String object to be constructed and pushed onto the stack. Pusing an int or a float causes a primitive value to be pushed onto the stack.

Exceptions

OutOfMemoryError - not enough memory to allocate a reference to a String

Notes
The ldc_w instruction is identical to the ldc instruction except for its wider constant pool index.

Where possible, its more efficient to use one of bipush, sipush, or one of the const instructions instead of ldc_w.

If the same string constant (i.e. a string with the same sequence of characters) appears in several different class files, only one String instance is built for that constant. The String.intern() method can be used to retrieve the instance used for a given sequence of characters.