diff --git a/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/ArrayListDemo.java b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/ArrayListDemo.java
new file mode 100644
index 0000000000..f425f19189
--- /dev/null
+++ b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/ArrayListDemo.java
@@ -0,0 +1,51 @@
+package com.baeldung.list.listvsarraylist;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Locale;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class ArrayListDemo {
+
+    private ArrayList<Passenger> passengers = new ArrayList<>(20);
+//    private LinkedList<Passenger> passengers = new LinkedList<>(); // compile time error
+
+    public ArrayList<Passenger> addPassenger(Passenger passenger) {
+        passengers.add(passenger);
+        return passengers;
+    }
+    
+    public ArrayList<Passenger> removePassenger(Passenger passenger) {
+        passengers.remove(passenger);
+        return passengers;
+    }
+
+    public ArrayList<Passenger> getPassengersBySource(String source) {
+        return new ArrayList<Passenger>(passengers.stream()
+            .filter(it -> it.getSource().equals(source))
+            .collect(Collectors.toList()));
+    }
+    
+    public ArrayList<Passenger> getPassengersByDestination(String destination) {
+        return new ArrayList<Passenger> (passengers.stream()
+            .filter(it -> it.getDestination().equals(destination))
+            .collect(Collectors.toList()));
+    }
+    
+    public long getKidsCount(ArrayList<Passenger> passengerList) {
+        return passengerList.stream()
+            .filter(it -> (it.getAge() <= 10))
+            .count();
+    }
+
+    public ArrayList<Passenger> getFinalPassengersList() {
+        return new ArrayList<Passenger> (Collections.unmodifiableList(passengers));
+    }
+
+    public ArrayList<String> getServicedCountries() {
+        return new ArrayList<String> (Stream.of(Locale.getISOCountries())
+            .collect(Collectors.toList()));
+    }
+
+}
diff --git a/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/ListDemo.java b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/ListDemo.java
new file mode 100644
index 0000000000..a9a182d21e
--- /dev/null
+++ b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/ListDemo.java
@@ -0,0 +1,53 @@
+package com.baeldung.list.listvsarraylist;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Locale;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class ListDemo {
+
+    private List<Passenger> passengers = new ArrayList<>(20);
+//    private List<Passenger> passengers = new LinkedList<>(); // No compile time error
+
+    public List<Passenger> addPassenger(Passenger passenger) {
+        passengers.add(passenger);
+        return passengers;
+    }
+    
+    public List<Passenger> removePassenger(Passenger passenger) {
+        passengers.remove(passenger);
+        return passengers;
+    }
+
+    public List<Passenger> getPassengersBySource(String source) {
+        return passengers.stream()
+            .filter(it -> it.getSource().equals(source))
+            .collect(Collectors.toList());
+    }
+    
+    public List<Passenger> getPassengersByDestination(String destination) {
+        return passengers.stream()
+            .filter(it -> it.getDestination().equals(destination))
+            .collect(Collectors.toList());
+    }
+    
+    public long getKidsCount(List<Passenger> passengerList) {
+        return passengerList.stream()
+            .filter(it -> (it.getAge() <= 10))
+            .count();
+    }
+
+    public List<Passenger> getFinalPassengersList() {
+        return Collections.unmodifiableList(passengers);
+    }
+
+    public List<String> getServicedCountries() {
+        return Stream.of(Locale.getISOCountries())
+            .collect(Collectors.toList());
+    }
+
+}
diff --git a/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/Passenger.java b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/Passenger.java
new file mode 100644
index 0000000000..9c61b70aa6
--- /dev/null
+++ b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/listvsarraylist/Passenger.java
@@ -0,0 +1,49 @@
+package com.baeldung.list.listvsarraylist;
+
+public class Passenger {
+
+    private String name;
+    private int age;
+    private String source;
+    private String destination;
+
+    public Passenger(String name, int age, String source, String destination) {
+        this.name = name;
+        this.age = age;
+        this.source = source;
+        this.destination = destination;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public String getSource() {
+        return source;
+    }
+
+    public void setSource(String source) {
+        this.source = source;
+    }
+
+    public String getDestination() {
+        return destination;
+    }
+
+    public void setDestination(String destination) {
+        this.destination = destination;
+    }
+
+}
diff --git a/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/listvsarraylist/ArrayListDemoUnitTest.java b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/listvsarraylist/ArrayListDemoUnitTest.java
new file mode 100644
index 0000000000..59094ab562
--- /dev/null
+++ b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/listvsarraylist/ArrayListDemoUnitTest.java
@@ -0,0 +1,91 @@
+package com.baeldung.list.listvsarraylist;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertNotNull;
+
+import java.util.ArrayList;
+import java.util.Locale;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class ArrayListDemoUnitTest {
+
+    ArrayListDemo application = new ArrayListDemo();
+
+    Passenger passenger1;
+    Passenger passenger2;
+    Passenger passenger3;
+
+    @BeforeEach
+    protected void setUp() {
+        passenger1 = new Passenger("Anna", 25, "London", "New York");
+        passenger2 = new Passenger("Binny", 35, "New York", "London");
+        passenger3 = new Passenger("Chandra", 8, "Paris", "New Delhi");
+        application.addPassenger(passenger1);
+        application.addPassenger(passenger2);
+        application.addPassenger(passenger3);
+    }
+
+    @Test
+    public void givenEmptyList_whenAddedPassenger_thenReturnCurrentPassengerList() {
+        ArrayList<Passenger> list = application.addPassenger(new Passenger("David", 54, "Milan", "Paris"));
+
+        assertNotNull(list);
+        assertThat(list).hasSize(4);
+    }
+
+    @Test
+    public void givenPassengerList_whenRemovedPassenger_thenReturnCurrentPassengerList() {
+        ArrayList<Passenger> list = application.removePassenger(passenger3);
+
+        assertNotNull(list);
+        assertThat(list).hasSize(2);
+    }
+
+    @Test
+    public void givenPassengerList_whenPassedWithSourceCity_thenReturnMatchingPassengerList() {
+        ArrayList<Passenger> list = application.getPassengersBySource("Singapore");
+        ArrayList<Passenger> list2 = application.getPassengersBySource("London");
+
+        assertThat(list).isEmpty();
+        assertThat(list2.get(0)).isEqualTo(passenger1);
+    }
+
+    @Test
+    public void givenPassengerList_whenPassedWithDestinationCity_thenReturnMatchingPassengerList() {
+        ArrayList<Passenger> list = application.getPassengersByDestination("Singapore");
+        ArrayList<Passenger> list2 = application.getPassengersByDestination("London");
+
+        assertThat(list).isEmpty();
+        assertThat(list2.get(0)).isEqualTo(passenger2);
+    }
+
+    @Test
+    public void givenPassengerList_whenFindKidsByAge_thenReturnKidsList() {
+        ArrayList<Passenger> list = new ArrayList<>();
+        list.add(passenger1);
+        list.add(passenger2);
+        list.add(passenger3);
+        long count = application.getKidsCount(list);
+
+        assertThat(count).isEqualTo(1);
+    }
+
+    @Test
+    public void givenPassengerList_whenCalledWithCollectionsFunction_thenReturnsListType() {
+        ArrayList<Passenger> list = application.getFinalPassengersList();
+
+        assertNotNull(list);
+        assertThat(list).hasSize(3);
+    }
+
+    @Test
+    public void givenCurrentLocale_whenUsingStreams_thenReturnsListType() {
+        ArrayList<String> servicedCountries = application.getServicedCountries();
+
+        assertNotNull(servicedCountries);
+        assertThat(servicedCountries).hasSize(Locale.getISOCountries().length);
+    }
+
+}
diff --git a/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/listvsarraylist/ListDemoUnitTest.java b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/listvsarraylist/ListDemoUnitTest.java
new file mode 100644
index 0000000000..cf239a79ce
--- /dev/null
+++ b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/listvsarraylist/ListDemoUnitTest.java
@@ -0,0 +1,92 @@
+package com.baeldung.list.listvsarraylist;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertNotNull;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class ListDemoUnitTest {
+
+    ListDemo application = new ListDemo();
+
+    Passenger passenger1;
+    Passenger passenger2;
+    Passenger passenger3;
+
+    @BeforeEach
+    protected void setUp() {
+        passenger1 = new Passenger("Anna", 25, "London", "New York");
+        passenger2 = new Passenger("Binny", 35, "New York", "London");
+        passenger3 = new Passenger("Chandra", 8, "Paris", "New Delhi");
+        application.addPassenger(passenger1);
+        application.addPassenger(passenger2);
+        application.addPassenger(passenger3);
+    }
+
+    @Test
+    public void givenEmptyList_whenAddedPassenger_thenReturnCurrentPassengerList() {
+        List<Passenger> list = application.addPassenger(new Passenger("David", 54, "Milan", "Paris"));
+
+        assertNotNull(list);
+        assertThat(list).hasSize(4);
+    }
+
+    @Test
+    public void givenPresentList_whenRemovedPassenger_thenReturnCurrentPassengerList() {
+        List<Passenger> list = application.removePassenger(passenger3);
+
+        assertNotNull(list);
+        assertThat(list).hasSize(2);
+    }
+
+    @Test
+    public void givenPresentList_whenPassedWithSourceCity_thenReturnMatchingPassengerList() {
+        List<Passenger> list = application.getPassengersBySource("Singapore");
+        List<Passenger> list2 = application.getPassengersBySource("London");
+
+        assertThat(list).isEmpty();
+        assertThat(list2.get(0)).isEqualTo(passenger1);
+    }
+
+    @Test
+    public void givenPresentList_whenPassedWithDestinationCity_thenReturnMatchingPassengerList() {
+        List<Passenger> list = application.getPassengersByDestination("Singapore");
+        List<Passenger> list2 = application.getPassengersByDestination("London");
+
+        assertThat(list).isEmpty();
+        assertThat(list2.get(0)).isEqualTo(passenger2);
+    }
+
+    @Test
+    public void givenPassengerList_whenFindKidsByAge_thenReturnKidsList() {
+        List<Passenger> list = new ArrayList<>();
+        list.add(passenger1);
+        list.add(passenger2);
+        list.add(passenger3);
+        long count = application.getKidsCount(list);
+
+        assertThat(count).isEqualTo(1);
+    }
+
+    @Test
+    public void givenPresentList_whenCalledWithCollectionsFunction_thenReturnsListType() {
+        List<Passenger> list = application.getFinalPassengersList();
+
+        assertNotNull(list);
+        assertThat(list).hasSize(3);
+    }
+
+    @Test
+    public void givenCurrentLocale_whenUsingStreams_thenReturnsListType() {
+        List<String> servicedCountries = application.getServicedCountries();
+
+        assertNotNull(servicedCountries);
+        assertThat(servicedCountries).hasSize(Locale.getISOCountries().length);
+    }
+
+}