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Java 9: Building Robust Modular Applications
book

Java 9: Building Robust Modular Applications

by Dr. Edward Lavieri, Peter Verhas, Jason Lee
April 2018
Intermediate to advanced content levelIntermediate to advanced
910 pages
33h 21m
English
Packt Publishing
Content preview from Java 9: Building Robust Modular Applications

Optimizing string concatenation [JEP 280]

JEP 280 is an interesting enhancement for the Java platform. Prior to Java 9, string concatenation was translated by javac into StringBuilder : : append chains. This was a sub-optimal translation methodology often requiring StringBuilder presizing.

The enhancement changed the string concatenation bytecode sequence, generated by javac, so that it uses INVOKEDYNAMIC calls. The purpose of the enhancement was to increase optimization and to support future optimizations without the need to reformat the javac's bytecode.

See JEP 276 for more information on INVOKEDYNAMIC.

The use of INVOKEDYAMIC calls to java.lang.invoke.StringConcatFactory allows us to use a methodology similar to lambda expressions instead ...

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Publisher Resources

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