Added a few code snippets (#9084)

core-java-modules/core-java-streams-3/src/main/java/com/baeldung/streams/closure/StreamClosureSnippets.java

@@ -0,0 +1,30 @@
+package com.baeldung.streams.closure;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.stream.Stream;
+
+/**
+ * Contains a couple of simple stream API usages.
+ */
+public class StreamClosureSnippets {
+
+    public static void main(String[] args) throws IOException {
+        // Collection based streams shouldn't be closed
+        Arrays.asList("Red", "Blue", "Green")
+          .stream()
+          .filter(c -> c.length() > 4)
+          .map(String::toUpperCase)
+          .forEach(System.out::print);
+
+        String[] colors = {"Red", "Blue", "Green"};
+        Arrays.stream(colors).map(String::toUpperCase).forEach(System.out::println);
+
+        // IO-Based Streams Should be Closed via Try with Resources
+        try (Stream<String> lines = Files.lines(Paths.get("/path/tp/file"))) {
+            // lines will be closed after exiting the try block
+        }
+    }
+}