Move optional to java-8-core (#5105)

core-java-8/src/main/java/com/baeldung/optional/PersonRepository.java

@@ -0,0 +1,9 @@
+package com.baeldung.optional;
+
+public class PersonRepository {
+
+    public String findNameById(String id) {
+        return id == null ? null : "Name";
+    }
+
+}

core-java-8/src/test/java/com/baeldung/optional/PersonRepositoryUnitTest.java

@@ -1,11 +1,11 @@
-package com.baeldung.throwsexception;
+package com.baeldung.optional;
 
 import org.junit.Test;
 
 import java.util.Optional;
 
-import static org.junit.Assert.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 public class PersonRepositoryUnitTest {
@@ -40,14 +40,4 @@ public class PersonRepositoryUnitTest {
         assertEquals("NAME", name);
     }
 
-    @Test
-    public void whenIdIsNonNull_thenShouldReturnNameUpperCase() throws Exception {
-        String name = Optional
-                .ofNullable(personRepository.findNameById("id"))
-                .map(String::toUpperCase)
-                .orElseThrow(Exception::new);
-
-        assertEquals("NAME", name);
-    }
-
 }

core-java/src/main/java/com/baeldung/throwsexception/PersonRepository.java

@@ -1,16 +1,10 @@
 package com.baeldung.throwsexception;
 
-import javax.annotation.Nullable;
 import java.sql.SQLException;
 import java.util.List;
 
 public class PersonRepository {
 
-    @Nullable
-    public String findNameById(String id) {
-        return id == null ? null : "Name";
-    }
-
     public List<String> findAll() throws SQLException {
         throw new SQLException();
     }