Java9: New Version-String Scheme

Prior to Java9, java do not follow standard version scheme format. For example, the updates are given like below.

 

Java SE 8 Update 131

Java SE 8 Update 145

 

From Java9 onwards, Java define a version-string scheme that easily distinguishes major, minor, and security-update releases.

 

For example, if you run ‘java -version’ command on jdk8, you will receive following kind of output.

$java -version
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)

 

When you run ‘java -version’ command on jdk9, you will receive following kind of output.

$ java -version
java version "9.0.4"
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)

 

9.0.4 follows the convention Major.Minor.Security.

 

Major: Specify Major release like significant features. Features may be removed in a major release.

 

Minor: The minor version number, incremented for a minor update release that may contain compatible bug fixes.

 

Security: The security level, incremented for a security-update release that contains critical fixes including those necessary to improve security.

 

 

Reference

https://openjdk.java.net/jeps/223

 

 

 

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