[java] Error:java: javacTask: source release 8 requires target release 1.8

Using IntelliJ IDE can't compile any projects. Screenshots of settings below:

Used JDK:

Project SDK and Language level:

Language Level:

Anybody have any ideas?

Many answers regarding Maven are right but you don't have to configure the plugin directly.

Like described on the wiki page of the Apache Maven Compiler Plugin you can just set the 2 properties used by the plugin.

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

I fixed it just by changing target compile version to 1.8. Its in:

File >> Settings >> Build, Execution, Deployment >> Compiler >> Java Compiler

I just re-import maven button, then the error disappeared.

If you are working with Android-studio 1.3, Follow the below steps -

Go to File - Project Structure

Under modules- app-Properties tab, choose Source Compatibility -1.8 and

Target Compatibility - 1.8.

And you are good to go.

In my case I fixed this issue by opening .iml file of project (it is located in project root folder and have name same as the name of project) and changing line <orderEntry type="jdk" jdkName="1.7" jdkType="JavaSDK" /> to <orderEntry type="jdk" jdkName="1.8" jdkType="JavaSDK" />

I had everything configured as in others answers here but by some reason Idea updated .iml file incorrectly.

This looks like the kind of error that Maven generates when you don't have the compiler plugin configured correctly. Here's an example of a Java 8 compiler config.

<project xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<!-- ... -->

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

<!-- ... -->

</project>

If none of the other answers work, check your Module SDK.

I had this error pop up for me after I had updated the project SDK to 1.8, the Javac compiler to 1.8, etc. The setting that was the problem for me was the "Module SDK".

(on Linux) Go to File > Project Structure... then in the window that opens, select Modules under Project Settings. Select the module in question from the list and then the Dependencies tab and make sure that Module SDK is set appropriately.

The quickest way I found:

• press:CTRL + SHIFT + A (For Mac ? + SHIFT + A)
• type: java compiler
• press: ENTER

In the Settings window, set the Target bytecode to 1.8

(or 9 for java9)

For me, the problem was about Maven not able to find proper configurations, since these items were specified in parent pom.

Changing File -> Settings -> Build, Excecution, Deployment -> Maven -> User Settings file to point to my custom settings with proper repositories fixed the problem that was otherwise hiding.

Found out about the problem through Help -> Show log in explorer -> clicking the log file, when previously only got the error in the title and "java.lang.NullPointerException" in the console.

This issue occurs if your module is configured with Annotation processor and other module is not.Set the same configuration for all the modules as it wold be cyclic dependency.

I fixed it by modify my POM file. Notice the last comment under the highest voted answer.

<plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>2.3.2</version>
        <configuration>
            <source>1.8</source>
            <target>1.8</target>
            <encoding>UTF-8</encoding>
        </configuration>
</plugin>

The source must matches the target.

Under compiler.xml file you will find :

<bytecodeTargetLevel>
  <module name="your_project_name_main" target="1.8" />
  <module name="your_project_name_test" target="1.8" />
</bytecodeTargetLevel>

and you can change the target value from your old to the new for me i needed to change it from 1.5 to 1.8

Solution of the problem is very simple.You have to open .idea/compiler.xml file on your Idea Project and

You should write appropriate target version

I fixed this by going to Project Structure -> Modules, find the module in question, click on Dependencies tab, change Module SDK to Project SDK.

With Intellij, using Maven, you must check that Intellij has auto-imported your project. You can check by clicking on the Maven tab on the right of your Editor.

If your Project is not here, then add the pom.xml file by clicking on +.

Obviously, the project must also have the relevant <build/> :

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

Don't forget to set dependencies for your module:

I have checked all of the above but the error still occurs.

But reimport all maven Projects (reload button inside Maven Projects panel) works in my case.

You need to go to the /.idea/compiler.xml and change target to required jdk level.

You need to go to Settings and set under the Java compiler the following:

also check the Project Settings

I've just spent a while struggling with the same problem. The only thing that worked for me was not using the built mvn (3.3.9) but pointing it to an external downloaded version (3.5.0). Finally the project opened and everything was good.

In your Gradle app level file >> compileOptions add this two lines

android {
  compileOptions {
    ...
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
    ...
   }
}

There are two ways to solve this problem:

1. Set settings (File -> Settings -> Build, Execution, Deployment -> Java Compiler):
2. Add a build section to your pom.xml: