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👉 Save time and effort with this [compact overview of all new Java features](https://www.happycoders.eu/java-versions/) from the latest version back to Java 10.
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### <br>Java Versions PDF Cheat Sheet
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In this practical and exclusive collection, you‘ll find the most important updates of each Java version summarized on one page each.
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**Stay up-to-date** with the latest Java features with [this PDF Cheat Sheet](https://www.happycoders.eu/java-versions/)!
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➤ [Hier geht's zur deutschen Version des PDFs](https://www.happycoders.eu/de/java-versionen/)
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[<imgsrc="/img/Java_Versions_PDF_Cheat_Sheet_Mockup_936.png"alt="Java Versions PDF Cheat Sheet Mockup"style="width: 468px; max-width: 100%;">](https://www.happycoders.eu/java-versions/)
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### The Big O Cheat Sheet
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👉 Use [this FREE 1-page PDF cheat sheet](https://www.happycoders.eu/big-o-cheat-sheet/) as a reference to quickly look up the 7 most important time complexity classes (with descriptions + examples).
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* Avoid lengthy research with this **concise overview of all Java versions up to Java 23**.
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***Discover the innovative features** of each new Java version, summarized on a single page.
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***Impress your team** with your up-to-date knowledge of the latest Java version.
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➤ [Hier geht's zur deutschen Version des PDFs](https://www.happycoders.eu/de/o-notation-cheat-sheet/)
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👉 [Download the Java Versions PDF](https://www.happycoders.eu/java-versions/)<br>
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### HappyCoders Newsletter
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_(Hier geht's zur deutschen Version →[Java-Versionen PDF](https://www.happycoders.eu/de/java-versionen/))_
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### <br>The Big O Cheat Sheet
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With this [1-page PDF cheat sheet](https://www.happycoders.eu/big-o-cheat-sheet/), you'll always have the **7 most important complexity classes** at a glance.
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[<imgsrc="/img/big-o-cheat-sheet-pdf-en-transp_936.png"alt="Big O PDF Cheat Sheet Mockup"style="width: 468px; max-width: 100%;">](https://www.happycoders.eu/big-o-cheat-sheet/)
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***Always choose the most efficient data structures** and thus increase the performance of your applications.
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***Be prepared for technical interviews** and confidently present your algorithm knowledge.
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***Become a sought-after problem solver** and be known for systematically tackling complex problems.
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👉 [Download the Big O Cheat Sheet](https://www.happycoders.eu/big-o-cheat-sheet/)<br>
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_(Hier geht's zur deutschen Version →[O-Notation Cheat Sheet](https://www.happycoders.eu/de/o-notation-cheat-sheet/))_
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### <br>HappyCoders Newsletter
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👉 Want to level up your Java skills?
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Sign up for the [HappyCoders newsletter](http://www.happycoders.eu/newsletter/) and get regular tips on programming, algorithms, and data structures!
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➤ [Hier geht's zum deutschen Newsletter](https://www.happycoders.eu/de/newsletter/)
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_(Hier geht's zur deutschen Version →[HappyCoders-Newsletter deutsch](https://www.happycoders.eu/de/newsletter/))_
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### <br>🇩🇪 An alle Java-Programmierer, die durch fundierte Kenntnisse über Datenstrukturen besseren Code schreiben wollen
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Trage dich jetzt auf die [Warteliste](https://www.happycoders.eu/de/mastering-data-structures-warteliste/) von „Mastering Data Structures in Java“ ein, und erhalte das beste Angebot!
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[<imgsrc="/img/mastering-data-structures-product-mockup-cropped-1600.png"alt="Mastering Data Structures Mockup"style="width: 640px; max-width: 100%;">](https://www.happycoders.eu/de/mastering-data-structures-warteliste/)
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