Maven: Viewing compile options?

Question

I\'m trying to track down this compile error:

$ mvn compile
...
[ERROR] /.../Reader.java:[14,13] try-with-resources is not supported in -source 1.5
(use -source          


        

Answer 1

This is because you are using a plain vanilla pom.xml that you have this issue.

By default, the maven-compiler-plugin, which is called when compiling the sources, compiles with Java 5, whatever you have set up as $JAVA_HOME:

Also note that at present the default source setting is 1.5 and the default target setting is 1.5, independently of the JDK you run Maven with.

To use a different compiler version (e.g. Java 8), you can set the following properties:

  1.8
  1.8

or configure the plugin directly:

  maven-compiler-plugin
  3.3
  
    1.8
    1.8