Executing unix statements inside java

Question

How do you execute unix statements inside a java program? I need to execute a unix executable shell_prog.ksh from inside a java program.

Answer 1

By the way, executing the "ls" command from within Java will not do anything unless you capture the output stream of the process running the "ls" command and display it:
try
Process p = Runtime.getRuntime.exec("ls");
BufferedReader read = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while( (line = read.readLine()) != null)
System.out.println("OUT>>>" + line);
catch(IOException ioe)
ioe.printStackTrace(System.err);
System.exit(1);
}