Working version with displayEnvironmentList

ZooProgram/src/Animal.java

@@ -40,6 +40,9 @@ public abstract class Animal {
         return this.foodType;
     }
     
+    public String getEnvironment(){
+        return this.environment;
+    }
     
 
 }

ZooProgram/src/App.java

@@ -19,11 +19,15 @@ public class App {
         myZoo.displayfoodRequirements(Rex);
         myZoo.displayfoodRequirements(Pix);
 
-        ArrayList<Animal> animalFoodReqList = new ArrayList<>();
-        animalFoodReqList.add(Rex);
-        animalFoodReqList.add(Pix);
-        myZoo.displayfoodListRequirements(animalFoodReqList);
+        ArrayList<Animal> animalList = new ArrayList<>();
+        animalList.add(Rex);
+        animalList.add(Pix);
 
+        myZoo.displayfoodListRequirements(animalList);
+        
+        myZoo.displayListDetials(animalList);
+
+        myZoo.displayEnvironmentList("house");
 
         }
     }

ZooProgram/src/Zoo.java

@@ -34,4 +34,18 @@ public class Zoo {
         }
     }
 
-}
+    public void displayListDetials(ArrayList<Animal>animalList){
+        for (int i=0; i < animalList.size();i++){
+            displayDetails(animalList.get(i));
+        }
+    }
+
+    public void displayEnvironmentList(String environment){
+        for (int i=0; i < animalArrayList.size();i++){
+            if(animalArrayList.get(i).getEnvironment() == environment){
+                System.out.println(animalArrayList.get(i).name);
+            }
+        }
+    }
+
+}
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