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Oracle acquired Sun in 2010, and since that time Oracle's hardware and software engineers have worked side-by-side to build fully integrated systems and optimized solutions designed to achieve performance levels that are unmatched in the industry. Early examples include the Oracle Exadata Database Machine X2-8 , and the first Oracle Exalogic Elastic Cloud , both introduced in late 2010. During 2011, Oracle introduced the SPARC SuperCluster T4-4 , a general-purpose, engineered system with Oracle Solaris that delivered record-breaking performance on a series of enterprise benchmarks. Oracle's SPARC-based systems are some of the most scalable, reliable, and secure products available today.
http://blogs.sun.com/roller/page/jglick?entry=pick_a_target_jdk_for
Sometimes you need to expose a method from one class to another class, but do not wish to make this method public for anyone to call (because you are not prepared to maintain it compatibly forever). If they happen to be in the same package, you can just use package-private access. But this does not work if they are not in the same package. Some module systems - NetBeans, OSGi - let you declare that some packages or classes are not to be accessed outside of the declaring module, even if marked public.