Module import declarations, which has been previewed in JDK 24 and JDK 23, enhances the Java language with the flexibility to succinctly import the entire packages exported by a module. This simplifies the reuse of modular libraries however doesn’t require the importing code to be in a module itself. It contains the next targets:
- Simplifying the reuse of modular libraries by letting total modules be imported without delay
- Avoiding the noise of a number of kind import-on-demand declarations when utilizing various elements of the API exported by a module
- Permitting newbies to extra simply use third-party libraries and elementary Java courses with out having to be taught the place they’re positioned in a package deal hierarchy
- Making certain that module import declarations work easily alongside present import declarations. Builders who use the module import characteristic wouldn’t be required to modularize their very own code.
Compact supply information and occasion predominant strategies would evolve the Java language so newbies can write their first applications without having to know language options designed for giant applications. Freshmen can write streamlined declarations for single-class applications and seamlessly broaden applications to make use of extra superior options as their abilities develop. Skilled builders can likewise get pleasure from writing small applications succinctly with out the necessity for constructs meant for programming within the massive. This characteristic has been previewed in JDK Variations 21, 22, 23, and 24, albeit underneath barely completely different names. In JDK 24 it was known as easy supply information and occasion predominant strategies.
Steady values are objects that maintain immutable information. As a result of steady values are handled as constants by the JVM, they permit the identical efficiency optimizations which might be enabled by declaring a discipline ultimate. However in comparison with ultimate fields, steady values supply better flexibility as to the timing of their initialization. A chief objective of the proposal, which is in a preview API stage, is enhancing the startup of Java functions by breaking apart the monolithic initialization of software state. Different targets embody enabling consumer code to securely get pleasure from constant-folding optimizations beforehand out there solely to JDK code. This ensures that steady values are initialized at most as soon as, even in multi-threaded applications, and decouples the creation of steady values from their initialization, with out important efficiency penalties.
