8u45 and the JRE expiration date

The JRE expires when a new security update becomes available. 8u45 will expire on July 14, 2015. 8u45 contains a new blacklist JAR entry.

IntelliJ IDEA Community Edition 14.1.3

The installer takes up about 195MB of disk space and then expands into around 550 MB. The UI theme can be set to IntelliJ (default) or Darcula (black background, with orange keywords e.g. import, new etc,). The next phase of the installer is Default Plugins (Java Frameworks such as JBoss Seam, Struts, Spring, J2EE), and Build Tools (ant, maven, gradle) and Web Development (HTML, JavaScript). There is also IdeaVIM, a VIM plugin which is not recommended - even if you are familiar with VIM. A Scala plugin is also an optional extra.

More Respect for Object-Relational Mapping in Java through JPA

As mentioned before, JPA is important. What JPA is can be understood here.