The java runtime system can be accessed by the Runtime class.
The runtime information – memory availability, invoking the garbage collector is possible by using Runtime class.
Knowing the free memory space:
Runtime.freeMemory() - Returns the free memory of
Runtime.maxMemory() - Returns the memory that JVM can use at the maximum.
Invoking garbage collector:
Runtime.gc();
Some other facilities that are provided by Runtime class are:
- Reading data through key board
- Using system properties and environment variables
- Running non-java programs from within a java application.
