Run garbage collector and finalization methods

void gc()

Runs the garbage collector.

void runFinalization()

Runs the finalization methods of any objects pending finalization.

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

    runtime.gc();
    runtime.runFinalization();
    
  }
}

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