// Get and save the Runtime object.
Runtime rt = Runtime.getRuntime();
// Create three temporary files
rt.exec("mktemp file1");
rt.exec("mktemp file2");
rt.exec("mktemp file3");
// Run the "ls" (directory lister) program
// with its output sent into a file
String[] args = { "ls", "-l", "file1", "file2", "file3" };
ExecAndPrint.run(args);
rt.exec("rm file1 file2 file3");
