diff --git a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingAddAllMethodDemo.java b/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingAddAllMethodDemo.java
deleted file mode 100644
index a7d24cdec8..0000000000
--- a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingAddAllMethodDemo.java
+++ /dev/null
@@ -1,24 +0,0 @@
-package com.baeldung;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-public class CopyListUsingAddAllMethodDemo {
-
-    static List<Integer> copyList(List<Integer> source) {
-        List<Integer> destination =  new ArrayList<>();
-
-        destination.addAll(source);
-
-        return destination;
-    }
-
-    public static void main(String[] args) {
-        List<Integer> source = Arrays.asList(11, 22, 33);
-
-        List<Integer> destination = copyList(source);
-
-        System.out.println("copy = " + destination);
-    }
-}
diff --git a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingCollectionsCopyMethodDemo.java b/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingCollectionsCopyMethodDemo.java
deleted file mode 100644
index bdf6726924..0000000000
--- a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingCollectionsCopyMethodDemo.java
+++ /dev/null
@@ -1,21 +0,0 @@
-package com.baeldung;
-
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-
-public class CopyListUsingCollectionsCopyMethodDemo {
-
-    static void copyList(List<Integer> source, List<Integer> destination) {
-        Collections.copy(destination, source);
-    }
-
-    public static void main(String[] args) {
-        List<Integer> source = Arrays.asList(11, 22, 33);
-        List<Integer> destination = Arrays.asList(1, 2, 3, 4, 5);
-
-        copyList(source, destination);
-
-        System.out.println("copy = " + destination);
-    }
-}
diff --git a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingConstructorDemo.java b/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingConstructorDemo.java
deleted file mode 100644
index b76a1448d4..0000000000
--- a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingConstructorDemo.java
+++ /dev/null
@@ -1,21 +0,0 @@
-package com.baeldung;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-public class CopyListUsingConstructorDemo {
-
-    static List<Integer> copyList(List<Integer> source) {
-
-        return new ArrayList<>(source);
-    }
-
-    public static void main(String[] args) {
-        List<Integer> source = Arrays.asList(11, 22, 33);
-
-        List<Integer> destination = copyList(source);
-
-        System.out.println("copy = " + destination);
-    }
-}
diff --git a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingJava8StreamDemo.java b/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingJava8StreamDemo.java
deleted file mode 100644
index 81ae533505..0000000000
--- a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingJava8StreamDemo.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package com.baeldung;
-
-import java.util.Arrays;
-import java.util.List;
-import java.util.stream.Collectors;
-
-public class CopyListUsingJava8StreamDemo {
-
-    static List<Integer> copyList(List<Integer> source) {
-        return source
-                .stream()
-                .collect(Collectors.toList());
-    }
-
-    public static void main(String[] args) {
-        List<Integer> source = Arrays.asList(11, 22, 33);
-
-        List<Integer> destination = copyList(source);
-
-        System.out.println("copy = " + destination);
-    }
-}