Different targets of the steady values proposal embody decoupling the creation of steady values from their initialization, with out vital efficiency penalties; guaranteeing that steady values are initialized not more than as soon as, even in multi-threaded packages; and enabling consumer code to soundly take pleasure in constant-folding optimizations beforehand solely out there to JDK-internal code. It’s not a purpose of the proposal to reinforce Java with a method to declare steady values or to change the semantics of last fields.
In explaining the motivation for the steady values proposal, the JEP notes that Immutability has benefits, as a result of an immutable object will be solely in a single state and due to this fact will be shared freely throughout a number of threads. The Java platform’s software for managing immutability is last fields, however last fields have limitations, such because the have to be set eagerly, that limit their applicability in lots of real-world functions.
