Java on Martin Ahrer

Java 25 major language and API improvements

Tue, 30 Sep 2025 00:00:00 +0000

Java ㉕ has been released in September 2025.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java Java ㉕.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 24 major language and API improvements

Wed, 27 Aug 2025 00:00:00 +0000

Java ㉔ has been released in March 2025.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java Java ㉔.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 23 major language and API improvements

Tue, 26 Aug 2025 00:00:00 +0000

Java ㉓ has been released in September 2024.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java ㉓.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 22 major language and API improvements

Tue, 10 Sep 2024 00:00:00 +0000

Java 22 has been released in March 2024.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java 22.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 21 major language and API improvements

Mon, 09 Sep 2024 00:00:00 +0000

Java 21 has been released in September 2023.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java 21.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 20 major language and API improvements

Fri, 06 Sep 2024 00:00:00 +0000

Java 20 has been released in March 2023.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java 20.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 19 major language and API improvements

Mon, 02 Sep 2024 00:00:00 +0000

Java 19 has been released in September 2022.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java 19.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 18 major language and API improvements

Thu, 29 Aug 2024 00:00:00 +0000

Java 18 has been released in March 2022.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java 18.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 17 major language and API improvements

Mon, 26 Aug 2024 00:00:00 +0000

Java LTS Release Adoption

Before we go into details of the enhancements and additions of Java ⑰ lets briefly look at new relic’s yearly State of the Java Ecosystem 2024 report.

Even though Java ⑰ LTS was released in September 2021, in 2023 only ~19% of the projects have been using it. Java ⑧ still had a share of 33%. and Java ⑪ was the dominant release with ~56%.

Java 16 major language and API improvements

Sun, 25 Aug 2024 00:00:00 +0000

Java ⑯ has been released in March 2021.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java ⑯.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 15 major language and API improvements

Fri, 23 Aug 2024 00:00:00 +0000

Java ⑮ has been released in September 2020.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java ⑮.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 14 major language and API improvements

Thu, 22 Aug 2024 00:00:00 +0000

Java ⑭ has been released in March 2020.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java ⑭.

For a more complete overview follow the links in the following sections referring to the official Oracle release documents.

Java 13 major language and API improvements

Thu, 08 Aug 2024 00:00:00 +0000

Java ⑬ has been released in September 2019.

The following content is summarizing the most important changes to the Java API, the Java language, and the JVM introduced with Java ⑬.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 12 major language and API improvements

Tue, 06 Aug 2024 00:00:00 +0000

Java ⑫ has been released in March 2019.

The following content is summarizing the most important changes to the Java API and the Java language introduced with Java ⑫.

For a more complete overview, follow the links in the following sections referring to the official Oracle release documents.

Java 11 major language and API improvements

Wed, 24 Jul 2024 00:00:00 +0000

Java LTS Release Adoption

Before we go into details of the enhancements and additions of Java ⑪ lets briefly look at new relic’s yearly State of the Java Ecosystem 2024 report.

Even though Java ⑪ LTS was released in 2018, in 2020 only ~11% of the projects have been using it. Java ⑧ was still the dominant Java release. In 2023 usage was still at 33% and only dropped to around 28% in 2024.

Java 10 major language and API improvements

Fri, 19 Jul 2024 00:00:00 +0000

Java ⑩ has been released in March 2018.

The following content is summarizing the most important changes to the Java API and the Java language introduced with Java ⑩.

For a more complete overview follow the links in the following sections referring to the official Oracle release documents.

Java 9 major language and API improvements

Tue, 16 Jul 2024 00:00:00 +0000

Java ⑨ has been released in September 2017 and is the first release starting a new release cycle with a new release every 6 months.

The following content is summarizing the most important changes to the Java API and the Java language introduced with Java 9.

Generating AsciiDoc using a Java annotation processor

Mon, 15 Jul 2024 00:00:00 +0000

In the past I have helped a number of customers with their journey of migrating their Java 8 based applications to Java 17 (and Java 21 later on). I came up with the idea of creating a slide deck covering the major Java language and API improvements to teach my customers and give some motivation to move on to the latest Java releases.