JAVA9 new features -17-smart Java compiler tool

1. Official feature

139:enhance Javac to Improve Build speed.

199:smart Java Compilation, Phase

2. Instructions for use

The first phase of the Smart Java Compilation tool (Sjavac) starts with the JEP139 project, which is used to increase the compilation speed of the JDK in the case of multi-core processors. Today, the project is in the second phase, JEP199, to improve the Java compiler tool and replace the current JDK compiler tool Javac, and then become the default generic Smart Compilation tool for the Java environment.

JDK9 also updated the Javac compiler to be able to run Java 9 Code compilation in the lower version of Java.

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Links: https://www.jianshu.com/p/4b9c79c01813
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JAVA9 new features -17-smart Java compiler tool