BAEL-112 - custom validator - format fixes

spring-mvc-java/src/main/java/com/baeldung/customvalidator/ContactNumberConstraint.java

@@ -16,7 +16,9 @@ import javax.validation.Payload;
 public @interface ContactNumberConstraint {
 
     String message() default "Invalid phone number";
+
     Class<?>[] groups() default {};
+
     Class<? extends Payload>[] payload() default {};
 
 }

spring-mvc-java/src/main/java/com/baeldung/customvalidator/ContactNumberValidator.java

@@ -6,7 +6,8 @@ import javax.validation.ConstraintValidatorContext;
 public class ContactNumberValidator implements ConstraintValidator<ContactNumberConstraint, String> {
 
     @Override
-    public void initialize(ContactNumberConstraint contactNumber) {}
+    public void initialize(ContactNumberConstraint contactNumber) {
+    }
 
     @Override
     public boolean isValid(String contactField, ConstraintValidatorContext cxt) {

spring-mvc-java/src/main/java/com/baeldung/model/ValidatedPhone.java

@@ -15,4 +15,8 @@ public class ValidatedPhone {
         this.phone = phone;
     }
 
+    @Override
+    public String toString() {
+        return phone;
+    }
 }