The java.lang.management Package

The java.lang.management package provides the management interface for monitoring and management of the JVM and the operating system. Specifically it covers interfaces for the following systems:

• Class loading

• Compilation

• Garbage collection

• Memory manager

• Runtime

• Threads

The JDK includes example code that demonstrates the usage of the java.lang.management package. These examples can be found in the $JAVA_HOME/demo/management directory. Some of these example codes are as follows:

• MemoryMonitor demonstrates the use of the java.lang.management API to observe the memory usage of all memory pools consumed by the application.

• FullThreadDump demonstrates the use of the java.lang.management API to get a full thread dump and detect deadlocks programmatically.

• VerboseGC demonstrates the use of the java.lang.management API to print the garbage collection statistics and memory usage of an application.

In addition to the java.lang.management package, the JDK release includes platform extensions in the com.sun.management package. The platform extensions include a management interface to obtain detailed statistics from garbage collectors that perform collections in cycles. These extensions also include a management interface to obtain additional memory statistics from the operating system.