#502 Replaced usages of System.out with logger.

step-builder/src/main/java/com/iluwatar/stepbuilder/App.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.stepbuilder;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * Step Builder Pattern
  *
@@ -56,6 +59,8 @@ package com.iluwatar.stepbuilder;
  */
 public class App {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+
   /**
    * Program entry point
    * 
@@ -67,18 +72,18 @@ public class App {
         CharacterStepBuilder.newBuilder().name("Amberjill").fighterClass("Paladin")
             .withWeapon("Sword").noAbilities().build();
 
-    System.out.println(warrior);
+    LOGGER.info(warrior.toString());
 
     Character mage =
         CharacterStepBuilder.newBuilder().name("Riobard").wizardClass("Sorcerer")
             .withSpell("Fireball").withAbility("Fire Aura").withAbility("Teleport")
             .noMoreAbilities().build();
 
-    System.out.println(mage);
+    LOGGER.info(mage.toString());
 
     Character thief =
         CharacterStepBuilder.newBuilder().name("Desmond").fighterClass("Rogue").noWeapon().build();
 
-    System.out.println(thief);
+    LOGGER.info(thief.toString());
   }
 }