Eclipse error

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I installed and configured java jdk 9.0.1 and also the eclipse as java ide,no eclipse when I create the project gives me error soonerro que da na consola

and as soon as I start writing "System.out.println" this error window appears inserir a descrição da imagem aqui

how can I fix this? Thank you

java path build
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    Unbound classpath container: 'JRE System Library [Javase-1.8]' in project 'Olaeclipse' - Suggests that you are using Java 9, but it looks for Java 8.

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    What’s your version of eclipse? If it’s neon, upgrade to Oxygen, which already supports java9 completely.

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    error gave in mars2

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    Look at this similar topic: https://stackoverflow.com/a/6798326/1964435

1 answer

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As you know, Java 9 still needs a lot of tweaking, and the development environments also need to be prepared to receive these tweaks.

When I installed Java 9 on my Ubuntu I also encountered several difficulties, so I followed this tutorial: Configure Eclipse for Java 9.

An important note is that you need to configure your environment variable, both on Linux and Windows. On iOS I don’t know... I don’t have support in this OS.

The Eclipse that will work is only the oxygen version. Only this version has Java 9 support.

Now come on!

First Step: Install Java 9 JDK

To download the installation file, click on this link! Since the focus is not installation but JDK configuration, let’s go to the next point...

Second Step: Configuring the environment variable in Windows 10

There are cases where the Windows operating system already recognizes automatically. But in my case, unlike this, I need to resolve manually by accessing advanced Operating System settings and pointing out the installation path of Java 9 in the PATH variable.

  1. In the windows window, right-click on the Start menu button, and go to the option System
  2. Now, go on System Information
  3. Now click Change Settings
  4. Click on the Advanced tab
  5. Click on Environment variables
  6. In system variables, search for the variable Path
  7. Click edit
  8. Find the Java 9 installation path. Generally, in Windows it looks like this: c: Programdata Oracle Java javapath
  9. This path - which may be another one like I said, but in most cases it is this - needs to be pointed out in its environment variable.

Confirm everything!

Now, to see if it’s working, you can create a class in Java with a main and make a classic "Hello World"!

I hope I contributed!

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    I switched to Oxygen and it’s working. Thank you

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    my problem is I was using a wrong version of the eclipse that was mars2 now I’m using Oxygen and it’s okay...

  • How great that you managed to solve the problem... it is important that you mark as solved this problem. The link I sent to you in this reply reports this.

  • @Carloshelberger to configure you can check this link: https://www.java.com/pt_BR/download/help/path.xml

  • Hello @Carlosheuberger. Very good your point of view. I will improve my position on this. on the PATH variable in Windows 7, I’ve had problems pointing. I don’t know why, but in any operating system, it’s possible to expect anything.

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