Get the instance of a runtime

static Runtime getRuntime()

Returns the runtime object associated with the current Java application.

public class Main {
  public static void main(String[] args) {
    Runtime runtime = Runtime.getRuntime();
  }
}

1. Runtime class
2. Get the instance of a runtime
3. Get the memory in your Java virtual machine
4. Shut down hook
5. Get the available processor
6. Exit and halt Java virtual machine
7. Run garbage collector and finalization methods
8. Execuate a system command