Runtime « Development Class « Java

2.Get Number of Available Processors
3.Execute system command
4.Determine when the application is about to exit
5.Getting the Size of the Java Memory Heap
6.Read all information that the child process sends to its standard output stream
7.Execute a command from code
8.Execute a command with more than one argument
9.Launch a Unix script with Java

10.Read output from a Command execution
11.Send an Input to a Command
12.From Runtime.exec() to ProcessBuilder
13.Get current size of heap in bytes
14.Get maximum size of heap in bytes.
15.Get amount of free memory within the heap in bytes.
16.Minimize all programs on Windows to show the Desktop
17.Command and its arguments supplied in an array
18.Execute a command with an argument that contains a space
19.Execute a command with an argument that contains a space: use array
20.Calculate process elapsed time
21.Registering Shutdown Hooks for Virtual Machine
22.Get memory information
23.Returns a description of the JVM.
24.Returns a description of the operating system and processor configuration.
25.Returns a report of used and available memory.
26.Ensure that there is only one instance
27.Returns used(max) memory in MB