Last Updated on December 20th, 2023

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Oracle has released JDK 20 (the eleventh six-month release) in March, 2023 and it’s general availability date is 2023/03/21. JDK 20 will be a short-term feature release that is supported for six months. However, JDK 19 will also be a non long-term-support (non-LTS) release, with extended support from Oracle expected for around eight years. Every Java Professional should be curious to know what is new in Java 20. But, how will we test the new features of Java 20 practically in the early days? However, we have a good news for Eclipse users.

In this article, we will learn ‘How to add JDK 20 support in Eclipse 2023-03 and other older version of eclipse as well. Thanks to Eclipse community as they provide solution for developers before every new release of JDK version.

Prior to the JDK 20, JDK 17 was a Long Term Support (LTS) release, with several years of support. It came in September 14, 2021. The next LTS release will be JDK 21 which is due around September, 2023 after the release of JDK 20 in March, 2023.

In this article, we will learn at least two ways of configuring JDK 20 in our eclipse. Each way will have step by step instructions to do it easily. Let’s start our topic ‘How to add JDK 20 support in Eclipse?’.

Pre-requisite

Before knowing ‘How to add JDK 20 support in Eclipse?’, we need to be sure that the following software are installed in our system.

♦ JDK 20 (you can download JDK 20 from the link)

♦ Eclipse 2023-03: Eclipse IDE for Enterprise Java and Web Developers (You can download Eclipse 2023-03 for Enterprise Java and Web Developers from the link as per your operating system). If you have lower versions of eclipse also, you can download the additions of JDK 20 via a plugin, that will also be discussed in this article.

Where can we download Java JDK latest version from?

There is an official website to download latest version of JDK. Even we can get the early access of future JDK versions as well from the link. Since we are discussing about JDK 20 in this article, we need to download JDK 20 first. The direct link to download JDK 20 is https://jdk.java.net/20/.

How to install Java/JDK 20?

In order to install JDK 20, you need to download the zip file by clicking the JDK 20 download link according to your operating system. However, you can visit the oracle site and search for the latest build of JDK 20 to get it installed. Then, you need to unzip the zip file and paste the ‘jdk-20’ folder in the directory where other jdk versions exist. However, in my case, it is ‘C:\Program Files\Java’ which is the native place of jdk installation.

Why to use Eclipse 2023-03?

If you download Eclipse 2023-03, you will get the inbuilt feature till JDK 19. Furthermore, you just need to download and install a plugin to get the additional feature of JDK 20. On the other hand, if you already have lower versions of Eclipse in your system, then also you can download & install the specific plugin to get the features of JDK 20.

How to install Eclipse? 

Eclipse community also recommends that we should have a specific version of Eclipse installed in our system in order to get the support of JDK 20. The specific version is Eclipse 2023-03. You can directly click on the link ‘Eclipse 2023-03 for Java EE developers‘ to get it. Once you click on the link you will be on the Eclipse download page, then you have to click on the download link appearing on the page or follow the updated steps mentioned there.

Steps: How to add JDK 20 support in Eclipse (eclipse jdk 20|eclipse java 20)

In order to add JDK 20 support in your eclipse, follow the below steps carefully. However, we are providing three ways to get it done. We also have included step by step images to have a clear understanding of the whole process.

Approach#1: Using Install New Software

Let’s follow below steps for the first method ‘Using Install New Software’.

1) Make sure you already installed JDK 20 and Eclipse 2023-03 on your system. If not, kindly visit a section given above for the guidelines in this article.

2) Open your eclipse, click on Help-> Install New Software

3) In the first field (Work with) paste the below URL and hit Enter.
https://download.eclipse.org/eclipse/updates/4.27-P-builds/

4) Multiple values with checkboxes will appear. You have to select ‘Eclipse Java 20 support for 2023-03 development stream’ and then click on ‘Next’ button. A new window will appear Which may ask you to ‘accept the terms and License agreement’. Once accepted, it will start downloading the artifacts. Click on ‘Finish’ to complete the process.

5) At the end, restart the eclipse. You may also be asked to restart the eclipse to get the new features.

6) Then you need to create one Test Project to check the JDK 20 support.

7) Now click on Project -> Properties. Then select ‘Project Facets’ from the left.

8) Click on ‘Java’ checkbox and then select ’20’ from the drop-down and then click on ‘Apply and Close’ button.

 

 

Approach#2: Using Eclipse Marketplace

However, Eclipse 2023-03 comes with Eclipse Marketplace. If you don’t find Marketplace option in any particular version, then you can refer our article ‘How to install marketplace in Eclipse‘. Let’s follow below steps for the method ‘Using Eclipse Marketplace’.

1) Make sure you already installed JDK 20 and Eclipse 2023-03 on your system. If not, kindly visit above section.

2) Open your eclipse, click on Help-> Eclipse Marketplace

3) In the search bar type ‘java 20’ or ‘jdk 20’ and hit enter.

4) You will find one item ‘Java 20 Support for Eclipse 2023-03 (4.27)

5) Now click on ‘Install’ button

6) Next, you will see the next window with heading ‘Confirm Selected Features’. You have to click on ‘Confirm’ button here. Let the checkboxes be selected as it is. Next, you may be asked to ‘accept terms & the license agreement’. Accept it and click on ‘Finish’.

7) Now, a popup window with the message ‘Restart Eclipse IDE to apply the software update’ will appear. Here, you have to click on ‘Restart now’ button.

8) Then, you need to create one Test Project to test the JDK 20 support.

9) Now, click on Project -> Properties. Then select ‘Project Facets’ from the left.

10) Click on ‘Java’ checkbox and then select ’20’ from the drop-down and then click on ‘Apply and Close’ button.

 

 

Approach#3: Using Drag & Drop facility provided by Eclipse Community

This is the easiest way to get JDK 20 feature in the eclipse. If this method doesn’t work for you, you may switch to below methods. Also, it is recommended that you should already have Eclipse 2023-03 in your System. Please follow below steps to get it done.

1) Open the link Java 19 Support for Eclipse 2023-03 (4.27). Hover your mouse on ‘Install’ button and you will see that it is draggable. This link may be expired once eclipse releases a new version with inbuilt functionality of Java 20.

2) Open your eclipse

3) Drop it to the workspace of your eclipse and follow the further instructions. You may see one item ‘Java 20 Support for Eclipse 2023-03 (4.27)’. Select it and click on ‘Confirm’ button. You may be asked to accept the ‘terms & the license agreement’. Accept it and then click on ‘Finish’ button.

4) You may be asked to restart the eclipse to reflect the changes. If you finished it without any error or warnings, you are done. Below screenshot demonstrates the steps.

How to Verify that Eclipse has Java 20 Support in place?

1) Click on Project -> Properties. Then select ‘Java Compiler’ from the left.
2) Uncheck the second checkbox (Use Compliance from execution environment)
3) Now click on the drop down there on the right side. You will see an additional entry for JDK 20, which is ’20’.
4) Select ’20’ and click on ‘Apply and close’.

♥ Finally, you are ready to develop a project in Eclipse using Java 20.

 

How to test JDK 20 features in Eclipse?

1) Create a new Java Test Project in Eclipse.
2) Right click on the project and navigate to Build Path -> Configure Build Path
3) Then, click on libraries
4) Now, add libraries from the right
5) Set the installation path for JDK 20
6) Finally, enjoy the testing of JDK 20 features.

That’s all about configuring & testing eclipse java 20| eclipse jdk 20 | eclipse java 20 support environment in your system.

Eclipse not recognizing Java-20 

If your eclipse is unable to recognize the Java 20 version, you need to follow above steps of this article.

For previous jdk versions, kindly visit respective link as given below:

♥ link for Java19: How to enable JDK 19 support in Eclipse?‘

♠ Here is the link to get to know ‘How to enable JDK 18 support in Eclipse?‘

♠ Here is the link to get to know ‘How to enable JDK 17 support in Eclipse?‘

♥  Also, Here is the link to get to know ‘How to enable JDK 16 support in Eclipse?‘

♥ And here is the link to get to know ‘How to enable JDK 15 support in Eclipse?‘