add changes

role-object/src/main/java/com/iluwatar/roleobject/ApplicationRoleObject.java

@@ -36,25 +36,26 @@ import static com.iluwatar.roleobject.Role.*;
  * A subject often plays several roles and the same role is likely to
  * be played by different subjects.
  * As an example consider two different customers playing the role of borrower and
- * investor, respectively. Both roles could as well be played by a single Customer object.
- * The common superclass for customer-specific roles is provided by CustomerRole,
- * which also supports the Customer interface.
+ * investor, respectively. Both roles could as well be played by a single {@link Customer} object.
+ * The common superclass for customer-specific roles is provided by {@link CustomerRole},
+ * which also supports the {@link Customer} interface.
  * <p>
- * The CustomerRole class is abstract and not meant to be instantiated.
- * Concrete subclasses of CustomerRole, for example Borrower or Investor,
+ * The {@link CustomerRole} class is abstract and not meant to be instantiated.
+ * Concrete subclasses of {@link CustomerRole}, for example {@link BorrowerRole} or {@link InvestorRole},
  * define and implement the interface for specific roles. It is only
  * these subclasses which are instantiated at runtime.
- * The Borrower class defines the context-specific view of Customer objects as needed by the loan department.
+ * The {@link BorrowerRole}  class defines the context-specific view of {@link Customer}  objects as needed by the loan department.
  * It defines additional operations to manage the customer’s
- * credits and securities. Similarly, the Investor class adds operations specific
+ * credits and securities. Similarly, the {@link InvestorRole} class adds operations specific
  * to the investment department’s view of customers.
- * A client like the loan application may either work with objects of the CustomerCore class, using the interface class
- * Customer, or with objects of concrete CustomerRole subclasses. Suppose the loan application knows a particular
- * Customer instance through its Customer interface. The loan application may want to check whether the Customer
+ * A client like the loan application may either work with objects of the {@link CustomerRole} class, using the interface class
+ * {@link Customer}, or with objects of concrete  {@link CustomerRole} subclasses. Suppose the loan application knows a particular
+ * {@link Customer} instance through its {@link Customer} interface. The loan application may want to check whether the {@link Customer}
  * object plays the role of Borrower.
- * To this end it calls hasRole() with a suitable role specification. For the purpose of
+ * To this end it calls {@link Customer#hasRole(Role)} with a suitable role specification. For the purpose of
  * our example, let’s assume we can name roles with enum.
- * If the Customer object can play the role named “Borrower,” the loan application will ask it to return a reference to the corresponding object.
+ * If the {@link Customer} object can play the role named “Borrower,” the loan application will ask it
+ * to return a reference to the corresponding object.
  * The loan application may now use this reference to call Borrower-specific operations.
  */
 public class ApplicationRoleObject {

role-object/src/main/java/com/iluwatar/roleobject/BorrowerRole.java

@@ -34,8 +34,7 @@ public class BorrowerRole extends CustomerRole{
     }
 
     public String borrow(){
-        return String.join(" ",
-                "A borrower",name,"wants to get some money.");
+        return String.format("Borrower %s wants to get some money.",name);
     }
 
 }

role-object/src/main/java/com/iluwatar/roleobject/InvestorRole.java

@@ -43,7 +43,6 @@ public class InvestorRole extends CustomerRole {
     }
 
     public String invest() {
-        return String.join(" ",
-                "Investor", name, "has invested", String.valueOf(amountToInvest), "dollars");
+        return String.format("Investor  %s has invested %d dollars", name, amountToInvest);
     }
 }

role-object/src/test/java/com/iluwatar/roleobject/BorrowerRoleTest.java

@@ -33,7 +33,7 @@ public class BorrowerRoleTest {
     public void borrowTest() {
         BorrowerRole borrowerRole = new BorrowerRole();
         borrowerRole.setName("test");
-        String res = "A borrower test wants to get some money.";
+        String res = "Borrower test wants to get some money.";
 
         Assert.assertEquals(borrowerRole.borrow(),res);
     }