System Commands - Java

Question

I\'m trying to make a little java program that executes a system command but I can\'t seem to figure it out

The question is how does one execute a system command us

Answer 1

You might want to have a look into the documentation for java.lang.ProcessBuilder. An example is given there.

Answer 2

Process Builder example

Answer 3

Apache Commons-Exec is similar to ProcessBuilder, but helps avoid a lot of common problems with the streams, process timeout, platform differences, etcetera. I recommend using that instead of ProcessBuilder.

Answer 4

Ultimately, you use the family of exec() methods in the java.lang.Runtime class. There's a class named java.lang.ProcessBuilder which helps in setting up a process to run, although you're not obligated to use it. Be sure to read this classic article on handling the input and output streams, running Windows CMD.EXE builtins, and other potential pitfalls.

Running a command can be as simple as saying

Runtime.exec("notepad");

but as that article points out, there are plenty of subtleties to worry about.