Add 50 additional Stream API examples

Author: javadev

pom.xml

@@ -10,8 +10,8 @@
     <name>java_stream_api</name>
 
     <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <junit.jupiter.version>5.13.0</junit.jupiter.version>
     </properties>