use -source 7 or higher

Question

While trying to build a project using intelliJ Ultimate 12 I am getting these errors

use -source or higher to enable diamond operator
use -source 7 or higher         


        

Answer 1

For me, it's because the maven-compiler-plugin's source and target is set to 1.6 rather than 1.7 in pom.xml, changing it to 1.7 solved the problem.

<plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.0</version>
    <configuration>
        <source>1.7</source>
        <target>1.7</target>
    </configuration>
</plugin>