Question

How can I change libraries on Eclipse with Maven builder?

When I change my JRE library by the project properties and then rebuild a project JRE returns to previous version.

How can I add a new library?

Answer 1

A library is just a dependency. You can add dependencies to you pom-file:

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.8.1</version>
    </dependency>

This add the junit-library.