Add assignment

Author: kappsegla

README.md

@@ -1,7 +1,21 @@
-# 🚀 Requirements
+# 🚀 Java Hello World
 
-Add requirements here
+This guide shows how to create a "Hello World" Java application.
 
+## 1. Classic Java (All Versions)
+
+**Code:**
+```java
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Hello World");
+    }
+}
+```
+## 3. Run
+```shell
+java .\src\main\java\com\example\Main.java
+```
 Maven Goals
 =========
 1. Clean:
@@ -10,4 +24,3 @@ Maven Goals
 2. Build:
     * mvn compile
     * mvn test
-    * 

src/test/java/org/example/MainTest.java

@@ -1,12 +1,31 @@
 package org.example;
 
+
+import com.example.Main;
 import org.junit.jupiter.api.Test;
 
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 class MainTest {
+
+
     @Test
-    void test() {
-        assertThat(true).isTrue();
+    void mainMethodShouldPrintHelloWorld() {
+        // Arrange: Capture System.out
+        ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+        PrintStream originalOut = System.out;
+        System.setOut(new PrintStream(outContent));
+
+        // Act: Run the main method
+        Main.main(new String[]{});
+
+        // Restore original System.out
+        System.setOut(originalOut);
+
+        // Assert: Check output
+        assertThat(outContent.toString().trim()).isEqualTo("Hello World");
     }
-}
+}