import java.io.*;

class Program {
	public static void main(String args[]) throws Exception {
		try {
			// Execute a command without arguments
			String command = "ls";
			Process child = Runtime.getRuntime().exec(command);

			// Execute a command with an argument
			command = "ls /tmp";
			child = Runtime.getRuntime().exec(command);
		}catch (IOException e){

		}
	}
}