examine protobuf msg

.idea/misc.xml

@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21 (5)" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file

pom.xml

@@ -9,8 +9,8 @@
     <version>1.0-SNAPSHOT</version>
 
     <properties>
-        <maven.compiler.source>8</maven.compiler.source>
-        <maven.compiler.target>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>
     </properties>
 

src/main/java/org/ds/Main.java

 package org.ds;
 
+import com.google.protobuf.InvalidProtocolBufferException;
+import org.ds.proto.Student;
+import org.ds.proto.Students;
+
 public class Main {
-    public static void main(String[] args) {
-        System.out.println("Hello world!");
+    public static void main(String[] args) throws InvalidProtocolBufferException {
+        byte[] msg = sender();
+        receiver(msg);
+
+    }
+
+    private static void receiver(byte[] msg) throws InvalidProtocolBufferException {
+        System.out.println("Received Data:");
+        for (int i = 0; i < msg.length; i++) {
+            System.out.print(msg[i] + " ");
+        }
+        System.out.println();
+        System.out.println(msg.length);
+        var students = Students.parseFrom(msg);
+        System.out.println(students.getStudentsList());
+    }
+
+    private static byte[] sender() {
+        Student student1 = Student.newBuilder().setName("Mohamad").setAge(40).build(); //builder pattern
+        Student student2 = Student.newBuilder().setName("Ahmad").setAge(40).build(); //builder pattern
+
+        Students students = Students.newBuilder().addStudents(student1).addStudents(student2).build();
+
+        byte[] arrayToSend = students.toByteArray();
+
+        for (int i = 0; i < arrayToSend.length; i++) {
+            System.out.print(arrayToSend[i] + " ");
+        }
+        System.out.println();
+        System.out.println(arrayToSend.length);
+        return arrayToSend;
     }
 }