IntelliJ IDE gives error when using Try-Catch with Resources

java intellij-idea try-catch try-catch-finally try-with-resources

37,325

Solution 1

Click on the File menu, open Project Structure, then under "Settings" there should be "Project". Within that tab, there'll be an SDK Settings option which specifies the language version you want to use.

See the JetBrains help page for more details ("Project language level").

Solution 2

The only way this error will occur is if your module's language level isn't set to 1.7+. This needs to be set in either your IntelliJ project/module settings, the project's pom.xml file, or both.

IntelliJ

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Maven

<properties>
  <maven.compiler.source>1.7</maven.compiler.source>
  <maven.compiler.target>1.7</maven.compiler.target>

Module settings can override project settings; if setting this at the project level and you have a specific issue in a module, check the module settings as well.

Solution 3

Besides mentioned instructions I also had to specify language level per module as well. File -> Project Structure -> Modules

Solution 4

Also check your code. You might have accidentally did something like this:

try (HttpClients.createMinimal().execute(new HttpGet(String.format(
          "http://127.0.0.1:%s/extra/LifecycleServlet?action=shutdown",
          runningPort)))) {

instead of

try (CloseableHttpResponse response = HttpClients.createMinimal().execute(new HttpGet(String.format(
          "http://127.0.0.1:%s/extra/LifecycleServlet?action=shutdown",
          runningPort)))) {

easy mistake to make when you don't intend on using the result of your closeable resource. yet it will have that misleading error.

Solution 5

Pictorial representation of module settings.

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37,325

Author by

Yankee

Runtime runtime = Runtime.getRuntime(); // Runtime! :D

Updated on August 21, 2020

Comments

Yankee over 3 years

I am attempting to use JDK 7's "try-catch with resources" statement; IntelliJ highlights my resource line, saying

Try-with-resources are not supported at this language level.

When I try to compile, I get:

java: try-with-resources is not supported in -source 1.6 (use -source 7 or higher to enable try-with-resources)

I checked that try-with-resources is enabled for my current project, and that my project is using JDK 7 (Library: C:\Program Files\Java\jdk1.7.0_11). Any ideas? I can't figure out what option to change (if that's even the issue).
Adam over 10 years

This is no longer valid in AS 0.3.4 and above.
Dave Newton over 10 years

@Adam Android Studio? The one based on the Intellij beta? What specifically isn't valid? Wouldn't it make more sense to provide actionable information, although nobody was talking about Android development?
conorgriffin over 9 years

This was the reason I had this issue.
chris544 almost 9 years

I still had to make changes in the "Modules" tab, it can overwrite Language level from the "Project" tab. So if the problem remains, check the Language level settings in "Modules" tab.
Dave Newton almost 9 years

@chris544 That's a good point; I'll edit that into the answer.
dragosb about 8 years

Ty for mentioning Maven...I was checking in my Intellij configurations and everything seemed ok
J11 over 7 years

If you are using Gradle check sourceCompatibility is set to 1.7 +
digestivee about 6 years

Thanks I had to do it too, you're a lifesaver