问题
In Eclipse, I am getting an error:
Build path specifies execution environment Java SE 1.7.
There are no JREs installed in the workspace that are strictly compatible with this environment.
回答1:
Try this
In Eclipse,
your project
-> properties
-> java build path : Libraries
Remove the "JRE System Library[J2SE 1.4]"
-> click "Add Library" button -> JRE System Library
-> select the new "Executin Environment" or Workspace default JRE
回答2:
Go to Project|Properties Choose the Java Build Path section Select the current JRE System Library, and choose Remove Select Add Library, and under the JRE System Library category pick your system library; you probably just need to choose the Workspace default JRE
More generally, under Window|Preferences, you can check Java|Installed JREs|Execution Environments to know which of the installed JREs match a specific execution environment.
回答3:
This should work:
- Your project > Build Path > Configure Build Path.
- Go to Libraries tab.
- Select JRE System Library [JavaSE-1.7].
- Press Edit.
- Notice that "Execution environment" is JavaSE-1.7 (jdk1.8.{y}).
- Click on Installed JREs.
- You should see jdk1.8.{y} but not jdk1.7.{x}.
- Press Add.
- Select Standard VM.
- Press Next.
- Locate your java folder, e.g.:
C:\Program Files\Java\jdk1.7.{x}. If you don't have it, you need to install it. - Populate JRE home with it. e.g.
C:\Program Files\Java\jdk1.7.0_80.
"Execution environment" will be JavaSE-1.7 (jdk1.7.0_80) now.
回答4:
Sounds like what I had after installing a newer Eclipse.
My solution:
Window->Preferences, Java->Installed JREs->Execution Environment.
Click the correct environment in the left panel, probably JavaSE-jre7
If the checkbox in the right panel is empty, check it.
If it's checked, but it isn't named jre7 [perfect match] then find the one in the left panel that does have 'perfect match' on the right and check that instead.
回答5:
I have this situation because I have multiple JDKs, and the JREs are nested below them. I'm building a JRE8 project but my current default is the latest v11. So the challenge is to get Eclipse to recognize the JDK>JREv8.
- Go to Preferences > Java > Installed JREs.
- Click Add.
- Navigate to the JRE under the JDK, which in my case is C:\Program Files\Java\jdk1.8.0_152\jre.
- Change the JRE name to JDK8 JRE8 just for clarity.
- Click Finish.
On build the error goes away. :)
回答6:
Go To Control Panel - check whether any new java version Updated -Uninstall it and Configure the Build Path JRE Library "Execution environment" to the Previous Version.
Probably if Java 7 is updated to Java 8 the above problem will occur. To avoid that warning, just you can uninstall the new update and restore the old version in execution environment.
回答7:
- Open eclipse
- Right click on your project -> click "properties"
- Select "Java Build Path" and then choose Librarires
- Delete JRE System Library [jre1.._***]
- Click "Add Library" and then choose "JRE System Library"
- The best solution is to mark "Workspace default JRE (jre1.,_***)
- Refresh project and wait for Tomcat or any other additional server to restart and then should be no error for "Execution environment.."Where to do it!
回答8:
Solved by
Right click on JRE System Library
Select Properties
Choose Workplace Default JRE
Apply and Close
来源：https://stackoverflow.com/questions/26345131/eclipse-ide-error-build-path-specifies-execution-environment-java-se-1-7