src/main/java/com/zipcodewilmington/generic/group/Group.java

@@ -3,41 +3,46 @@ package com.zipcodewilmington.generic.group;
 import com.zipcodewilmington.generic.identifiables.IdentifiableInterface;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.function.Predicate;
 
 /**
  * @author leon on 06/12/2018.
  */
-public class Group<ChangeThisTypeRespectively,ChangeThisOneToo> extends AbstractGroup{
+public class Group<TypeOfId extends Serializable,TypeOfEntity extends IdentifiableInterface<TypeOfId>>
+        extends AbstractGroup<TypeOfId, TypeOfEntity>{
+    private List<TypeOfEntity> group = new ArrayList<>();
+
     @Override
     public Integer count() {
-        return null;
+        return group.size();
     }
 
     @Override
-    public void insert(IdentifiableInterface object) {
-
+    public void insert(TypeOfEntity object) {
+        group.add(object);
     }
 
     @Override
-    public void delete(IdentifiableInterface object) {
+    public void delete(TypeOfEntity object) {
+        group.remove(object);
 
     }
 
     @Override
-    public void delete(Serializable serializable) {
-
+    public void delete(TypeOfId serializable) {
+        group.remove(serializable);
     }
 
     @Override
-    public Boolean has(IdentifiableInterface object) {
-        return null;
+    public Boolean has(TypeOfEntity object) {
+        return group.contains(object);
     }
 
     @Override
-    public Boolean has(Serializable serializable) {
-        return null;
+    public Boolean has(TypeOfId serializable) {
+        return group.contains(serializable);
     }
 
     @Override

src/main/java/com/zipcodewilmington/generic/identifiables/ActionFigure.java

@@ -5,14 +5,15 @@ import java.io.Serializable;
 /**
  * @author leon on 05/12/2018.
  */
-public class ActionFigure implements IdentifiableInterface {
+public class ActionFigure implements IdentifiableInterface<Long> {
+    private Long id;
 
     @Override
-    public Serializable getIdentity() {
-        return null;
+    public Long getIdentity() {
+        return id;
     }
 
     public Class getIdentityType() {
-        return null;
+        return Long.class;
     }
 }

src/main/java/com/zipcodewilmington/generic/identifiables/Person.java

@@ -5,14 +5,15 @@ import java.io.Serializable;
 /**
  * @author leon on 05/12/2018.
  */
-public class Person implements IdentifiableInterface {
+public class Person implements IdentifiableInterface<String> {
+    private String id;
 
     @Override
-    public Serializable getIdentity() {
-        return null;
+    public String getIdentity() {
+        return id;
     }
 
     public Class getIdentityType() {
-        return null;
+        return String.class;
     }
 }