Java Developer Tools:
Oracle has released Java 7 update 40, with some major new features in JDK 7 Update 40 (7u40) release. Java Mission Control is bundled with this JDK release a JVM monitoring tool, Rule Sets for Java applets and Web Start applications, and a lots of bug fixes.
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collection framework built into the Oracle JDK. It allows Java administrators and developers to gather detailed low level information about how the Java Virtual Machine (JVM) and the Java application are behaving.