In Eclipse no maven project is not showing compilation errors.
How to configure eclipse so that it shows compilations errrors in java files for Maven projects?
I think you misunderstood saurav who was asking if you installed the m2ecliplse plugin into Eclipse, not whether you have installed Maven 2. That plugin will generate proper Maven-based projects within Eclipse.
Is the base source folder registered in Eclipse as a source folder? Are the .java source files being opened by the Java Editor?