Utworzenie projektu w Eclipse

.gitignore

+/target/
+
+/.settings/
+/.classpath
+/.project
+
+/*.iml
+/.idea/

pom.xml

+<project xmlns="http://maven.apache.org/POM/4.0.0"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>pl.alx.kjava</groupId>
+    <artifactId>KursPodstawowyALX</artifactId>
+    <version>1.0</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>
\ No newline at end of file

src/main/java/Hello.java

+class Hello {
+    public static void main(String[] args) {
+        System.out.println("Hello world!");
+        System.out.println("Druga linia\nTrzecia linia");
+    }
+}
\ No newline at end of file