BAEL-833: How to get last element of a Stream in Java? (#1930)

* Different Types of Bean Injection in Spring

* Fixed code formatting and test names for "Different Types of Bean Injection in Spring"

* BAEL-833: How to get last element of a Stream in Java?

* BAEL-833: Updated based on review from editor

core-java/src/main/java/com/baeldung/stream/StreamApi.java

@@ -0,0 +1,24 @@
+package com.baeldung.stream;
+
+import java.util.List;
+import java.util.stream.Stream;
+
+public class StreamApi {
+
+    public String getLastElementUsingReduce(List<String> valueList) {
+        Stream<String> stream = valueList.stream();
+        return stream.reduce((first, second) -> second).orElse(null);
+    }
+    
+    public Integer getInfiniteStreamLastElementUsingReduce() {
+        Stream<Integer> stream = Stream.iterate(0, i -> i + 1);
+        return stream.limit(20).reduce((first, second) -> second).orElse(null);
+    }
+    
+    public String getLastElementUsingSkip(List<String> valueList) {
+        long count = valueList.stream().count();
+        Stream<String> stream = valueList.stream();
+        return stream.skip(count - 1).findFirst().orElse(null);
+    }
+
+}

core-java/src/test/java/com/baeldung/stream/StreamApiTest.java

@@ -0,0 +1,43 @@
+package com.baeldung.stream;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Test;
+
+public class StreamApiTest {
+    private StreamApi streamApi = new StreamApi();
+
+    @Test
+    public void givenList_whenGetLastElementUsingReduce_thenReturnLastElement() {
+        List<String> valueList = new ArrayList<String>();
+        valueList.add("Joe");
+        valueList.add("John");
+        valueList.add("Sean");
+
+        String last = streamApi.getLastElementUsingReduce(valueList);
+
+        assertEquals("Sean", last);
+    }
+    
+    @Test
+    public void givenInfiniteStream_whenGetInfiniteStreamLastElementUsingReduce_thenReturnLastElement() {
+        Integer last = streamApi.getInfiniteStreamLastElementUsingReduce();
+        assertEquals(new Integer(19), last);
+    }
+    
+    @Test
+    public void givenListAndCount_whenGetLastElementUsingSkip_thenReturnLastElement() {
+        List<String> valueList = new ArrayList<String>();
+        valueList.add("Joe");
+        valueList.add("John");
+        valueList.add("Sean");
+
+        String last = streamApi.getLastElementUsingSkip(valueList);
+
+        assertEquals("Sean", last);
+    }
+
+}