The Issue
When I cloned the AngularJS Seed project from GitHub, and imported to eclipse, the project will use JRE 1.5.
The Solution
The problem is that pom.xml file did not provide the maven compile plugin.
Here is the update version of pom.xml
4.0.0 angularjs-maven-tomcat-seed angularjs-maven-tomcat-seed 0.0.1-SNAPSHOT war org.apache.tomcat.maven tomcat7-maven-plugin 2.2 maven-compiler-plugin 2.3.2 default-testCompile test-compile testCompile 1.7 UTF-8 default-compile compile compile 1.7 UTF-8 1.7 UTF-8 org.apache.tomcat.maven tomcat7-maven-plugin 2.2