Java lambda expressions not supported at this language level
In IntelliJ IDEA:
In File Menu
→ Project Structure
→ Project
, change Project Language Level
to 8.0 - Lambdas, type annotations etc.
For Android 3.0+ Go File
→ Project Structure
→ Module
→ app
and In Properties Tab set Source Compatibility
and Target Compatibility
to 1.8 (Java 8)
Screenshot:
lambda expressions are not supported at this language level IDEA
the answer is the following: I had to change the language level not only in project structure->project but in project structure-> modules too.
IntelliJ - Diamond types and Lambda expressions are not supported at language level 5
Check the language settings of the module. It is possible for modules to have a different language setting than the project. This makes it possible for different parts of the project to use different language levels.
Lambda expressions are not supported in -source 6
You need to specify in the pom the java version your project uses. Add this section to your pom.xml
to specify java 8 for instance
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
</plugins>
</build>
Error:(23, 26) java: lambda expressions are not supported in -source 1.5 (use -source 8 or higher to enable lambda expressions)
Fixed this issue. I found it was unnecessary to add java1.8 into pom.xml. I just need to change the Modules->language level into 8 - Lambdas,type annotations etc.
intellij with Android SDK : lambda expressions are not supported in -source 1.7
Check your build.gradle files. They might have settings that override what you specified in the IDE. If this is the case, either remove the settings completely or modify them for Java 8 compatibility.
Lambda expressions are not supported at this language level
You can use lambdas on Java 7, but it is a bit involved — you have to use something like Retrolambda.
Also you can do the same thing without lambdas. Lambdas can be easily represented via annonymous classes, however it is a lot more verbose.
final String first = data.first();
JavaRDD<String> filteredData = data.filter(new Function<String, Boolean>() {
@Override public Boolean call(String s) {
return !s.contains(first);
}
});
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