Add the CLDemo class

Author: pavel-rossinsky

src/main/java/com/guide/c5/CLDemo.java

@@ -0,0 +1,12 @@
+package com.guide.c5;
+
+// Display all command-line information.
+public class CLDemo {
+    public static void main(String[] args) {
+        System.out.println("There are " + args.length + " command-line arguments.");
+
+        System.out.println("They are: ");
+        for (int i = 0; i < args.length; i++)
+            System.out.println("arg[" + i + "]: " + args[i]);
+    }
+}