Java Runtime class

The runtime class represents the runtime environment of a Java program, each Java program has a corresponding runtime instance, which is connected to the runtime environment by the application, and the application cannot create its own runtime instance, but can pass the GetRuntime () method to get the runtime object associated with it.

runtime represents the runtime environment of a Java program and can access information about the JVM, such as the number of processors and memory information.

2. import  java.io.bufferedreader;  
4. Import  Java.io.InputStreamReader;
8. Public class Test {
9. Public Static voidMain (string[] args)throwsException
11. {
17. Runtime Rt=runtime.getruntime ();
19. System.out.println (Rt.freememory ());
21. System.out.println (Rt.availableprocessors ());
23. System.out.println (Rt.totalmemory ());
25. System.out.println (Rt.maxmemory ());
27. System.out.println (Rt.availableprocessors ());
33. }
35. }

Runtime can start a single process directly to run the operating system commands

2. import  java.io.bufferedreader;  
4. Import  Java.io.InputStreamReader;
8. Public class Test {
9. Public Static voidMain (string[] args)throwsException
11. {
17. Runtime Rt=runtime.getruntime ();
19. Rt.exec ("notepad.exe");
25. }
27. }

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Java Runtime class