added command sample

command/src/main/java/com/iluwatar/Size.java

@@ -0,0 +1,31 @@
+package com.iluwatar;
+
+public enum Size {
+
+	SMALL,
+	NORMAL,
+	LARGE;
+
+	@Override
+	public String toString() {
+		
+		String s = "";
+		
+		switch (this) {
+		case LARGE:
+			s = "large";
+			break;
+		case NORMAL:
+			s = "normal";
+			break;
+		case SMALL:
+			s = "small";
+			break;
+		default:
+			break;
+		}
+		return s;
+	}
+
+	
+}