IDEA: javac: source release 1.7 requires target release 1.7

Question

When running a JUnit test, using IntelliJ IDEA, I get

enter image description here

How can I correct this?

Using SDK 1.7
Module language level is 1.7

Maven build works fine. (That's why I believe this in IDEA configuration issue)

CrazyCoder · Accepted Answer · 2017-04-30T22:40:30.187

743

Most likely you have incorrect compiler options imported from Maven here:

compiler options

Also check project and module bytecode (target) version settings outlined on the screenshot.

Other places where the source language level is configured:

Project Structure | Project

Project Structure | Modules (check every module) | Sources

Maven default language level is 1.5 (5.0), you will see this version as the Module language level on the screenshot above.

This can be changed using maven-compiler-plugin configuration inside pom.xml:

<project>
  [...]
  <build>
    [...]
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
    [...]
  </build>
  [...]
</project>

or

<project>
  [...]
  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  [...]
</project>

IntelliJ IDEA will respect this setting after you Reimport the Maven project in the Maven Projects tool window:

edited Apr 30 '17 at 22:40

answered Oct 15 '12 at 17:26

CrazyCoder

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2

Correct. Is this setting common to all modules in a project, or is it specific to a given module? – James Raitsev Oct 15 '12 at 17:29
1

This setting is per project, affects all modules. – CrazyCoder Oct 15 '12 at 17:30
8

Is there any reason why after fixing this and applying that it would revert back to some incorrect value (either via maven changes or something)? – Patrick Dec 03 '12 at 21:36
5

@Patrick, your `pom.xml` java compiler plug-in configuration may specify Java version that will override this setting next time you make changes to the pom.xml (if automatic reimport is enabled) or reimport the project manually. – CrazyCoder Dec 03 '12 at 23:18
1

@CrazyCoder I changed my pom.xml after changing this once much earlier (was waiting on other incoming changes to the pom), so that sounds like a pretty reasonable explanation. Thanks – Patrick Dec 04 '12 at 19:25
What should i put as a command line in the yellow part as you remarked it? – michdraft Jan 02 '14 at 10:48
@michdraft leave it blank. – CrazyCoder Jan 02 '14 at 12:16
You may need to 'synchronize' pom.xml in IntelliJ after making updates. – bbarker Dec 09 '16 at 17:14
The [Setting the -source and -target of the Java Compiler](https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html) page suggests an even shorter addition to the POM file that worked for me, four lines: ` 1.8 1.8 ` – Basil Bourque Mar 20 '17 at 06:25
Thank you. Project SDK is fantastic option :) – RoutesMaps.com Jul 23 '19 at 11:57

score 359 · Answer 2 · edited May 08 '17 at 07:05

359

IntelliJ 15, 2016 & 2017

Similar to that discussed below for IntelliJ 13 & 14, but with an extra level in the Settings/Preferences panel: Settings > Build, Execution, Deployment > Compiler > Java Compiler.

IntelliJ 13 & 14

In IntelliJ 13 and 14, check the Settings > Compiler > Java Compiler UI to ensure you're not targeting a different bytecode version in your module.

enter image description here

edited May 08 '17 at 07:05

Yassin Hajaj

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answered Jan 18 '14 at 21:02

Drew Noakes

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I had to delete my modules and let it auto resolve (leave blank for jdk default) – Akin Okegbile Mar 27 '15 at 17:44
3

Works for latest Idea14.1 – Tushar Jun 23 '15 at 09:15
So what's the fix here? – AlikElzin-kilaka Apr 04 '16 at 05:35
@AlikElzin-kilaka, set the target level to whatever you need. – Drew Noakes Apr 04 '16 at 10:55
Can someone explain why would they put specific module settings in the global preferences config screen, not in the module settings?? – MK. Nov 08 '16 at 15:04
@MK I second your question. I have the module's JDK set to 1.8, the Language Level set to 8, and then there's this random f'ing setting over in Settings that still has the module set to 1.7. It's absurd. – MegaMatt Jan 05 '17 at 14:38

Elrond_EGLDer · Answer 3 · 2015-05-04T15:19:26.583

61

In IntelliJ IDEA 14.1 the "Target bytecode version" is in a different place.

The following change worked for me:

File > Settings... > Build, Execution, Deployment > Compiler > Java Compiler : change Target bytecode version from 1.5 to 1.8

enter image description here

edited May 04 '15 at 15:19

answered Apr 07 '15 at 22:12

Elrond_EGLDer

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or it is better to leave it blank, when it can be determined from jdk! – Dragonborn Nov 13 '15 at 09:42
Why is there a different configuration than maven's? – AlikElzin-kilaka Apr 04 '16 at 05:36

score 42 · Answer 4 · answered Aug 25 '13 at 11:29

Have you looked at your build configuration it should like that if you use maven 3 and JDK 7

<build>
    <finalName>SpringApp</finalName>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
        ...
    </plugins>
    ...
</build>

score 23 · Answer 5 · answered Dec 13 '12 at 04:20

23

I ran into this and the fix was to go to Project Settings > Modules > click on the particular module > Dependencies tab. I noticed the Module SDK was still set on 1.6, I changed it to 1.7 and it worked.

answered Dec 13 '12 at 04:20

Rob Barreca

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I tried this... I ended up having to delete the individual modules and leaving them to auto resolve. – Akin Okegbile Mar 27 '15 at 17:43

score 15 · Answer 6 · answered Jun 15 '13 at 10:57

15

I've found required options ('target bytecode version') in settings > compiler > java compiler in my case (intelij idea 12.1.3)

answered Jun 15 '13 at 10:57

eger

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score 10 · Answer 7 · answered Jun 08 '15 at 14:14

10

Modify the compiler setting file of the project in the following path and change the 'target' to 1.7:

/project/.idea/compiler.xml

<bytecodeTargetLevel>
  <module name="project-name" target="1.7" />
</bytecodeTargetLevel>

answered Jun 08 '15 at 14:14

Joe Cheng

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Thanks this worked for me! Don't forget to do "Make Module '[your app name]'" by right clicking on the project – Shehaaz Jun 20 '15 at 18:31

score 5 · Answer 8 · answered Dec 20 '14 at 12:08

5

I resolved it by setting the field blank:

Settings > Compiler > Java Compiler > Project bytecode version

Than IntelliJ uses the JDK default version.

answered Dec 20 '14 at 12:08

Robert Moszczynski

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score 4 · Answer 9 · answered Jul 20 '13 at 09:31

4

From one moment to the other I also got this error without a clear reason. I changed all kinds of settings on the compiler/module etc. But in the end I just recreated the IntelliJ project by reimporting the Maven project and the issue was solved. I think this is a bug.

IntelliJ 12 129.961

answered Jul 20 '13 at 09:31

pveentjer

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Same here for IntelliJ 14.1.2. Reimported the project and it was fixed. – srikanth Aug 16 '15 at 05:11

score 4 · Answer 10 · answered Apr 06 '15 at 08:58

4

I've hit this after just minor upgrade from IntelliJ IDEA 14 to v14.1. For me changing an edit of top/parent pom helped and then clicked re-import Maven (if it is not automatic).

But it maybe just enough to Right Click on module(s)/aggregated/parent module and Maven -> Reimport.

answered Apr 06 '15 at 08:58

OMax

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this worked for me! i did it for my top-level module and my child modules – abelnation Apr 21 '15 at 02:29

score 2 · Answer 11 · answered Dec 12 '14 at 06:29

2

I resolved bellow method

File >> Project Structure >> Project >> Project Language Level --> do set proper version (ex: 1.5)

answered Dec 12 '14 at 06:29

mati

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score 1 · Answer 12 · answered Aug 24 '13 at 00:49

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check .idea/misc.xml sometimes you need to change languageLevel="JDK_1_X" attribute manually

answered Aug 24 '13 at 00:49

k.a.i

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score 1 · Answer 13 · answered Apr 12 '16 at 01:14

If it is a Gradle project, in your build.gradle file, search for following settings:

sourceCompatibility = "xx"
targetCompatibility = "xx"

For all subrpojects, in your root build.gradle file, you may put:

subprojects { project ->
    sourceCompatibility = "1.7"
    targetCompatibility = "1.7"
}

Although you can manually set language levels in Idea > Settings, if it is a Gradle project, Idea automatically synchronizes module .iml files from Gradle settings ( tested with Idea 15+). So all your manual changes are overriden when gradle is refreshed.

Based on Gradle documentation, if these are not set, then current JVM configuration is used.

score 1 · Answer 14 · answered Jun 24 '16 at 17:59

I found another way to run into this error. You can get this if you have been re-organizing your directory structure, and one of your poms is pointing to the old parent which no-longer configures javac (because that configuration was moved to a middle level). If this happens the top level defaults to 1.5 and the misbehaving lower level pom inherits it.

So another thing to check when you see this error is that your pom structure is matching your directory structure properly.

score 1 · Answer 15 · answered Jul 27 '17 at 09:20

If Maven build works fine, try to synchronizing structure of Maven and IntelliJ IDEA projects.

In the Maven tool window, click refresh button . On pressing this button, IntelliJ IDEA parses the project structure in the Maven tool window.

Note that this might not help if you're using EAP build, since Maven synchronization feature may be broken sometimes.

score 1 · Answer 16 · answered Oct 08 '18 at 10:15

1

You need to change Java compiler version in in build config.

answered Oct 08 '18 at 10:15

Nirbhay Rana

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score 0 · Answer 17 · answered Nov 09 '16 at 22:39

0

Make sure right depency is selected. File > Project Structure

Select your project and navigate to Dependencies tab. Select right dependancy from dropdown or create new.

answered Nov 09 '16 at 22:39

Viraj Kulkarni

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score 0 · Answer 18 · answered Apr 23 '18 at 12:13

If all the previous solutions haven't worked for you (which was my case), you can delete intellij config files:

project_directory/.idea/compiler.xml
project_directory/.idea/encodings.xml
project_directory/.idea/misc.xml
project_directory/.idea/modules.xml
project_directory/.idea/vcs.xml
project_directory/.idea/workspace.xml
etc.

Intellij will regenerate new ones later. However, BE CAREFUL, this will also delete all intellij configuration made on the projet (i.e: configuration of debug mode, ...)

IDEA: javac: source release 1.7 requires target release 1.7

18 Answers18

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