QT Creator 4.12.4 and Java Lambda issue

[sevketk]

I already have android studio installed on my computer

B6ZlBkQVmw.png

And its configure JDK , Android Sdk

studio64_VXLEkKtHfS.jpg

so far so good. if I set same variable to QT creator

qtcreator_k2Utkgn4R6.png

qtcreator_46IbeDx5u3.jpg

when i run my project, there is no problem. so far so good

but whenever I add a lambda expression to my java file, I get an error.

qtcreator_90X7mIEVOY.jpg

> Task :compileDebugJavaWithJavac FAILED
E:\kutuphane\belgelerim\QT Projects\JniTest2\android-build\src\org\qtproject\example\JniTest2\TerminalFragment.java:336: error: method references are not supported in -source 1.7
            rtsBtn.setOnClickListener(this::toggle);
                                            ^
  (use -source 8 or higher to enable method references)
1 error
 
FAILURE: Build failed with an exception.
 
* What went wrong:
Execution failed for task ':compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
 
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
 
* Get more help at https://help.gradle.org

> Task :compileDebugJavaWithJavac FAILED
E:\kutuphane\belgelerim\QT Projects\JniTest2\android-build\src\org\qtproject\example\JniTest2\TerminalFragment.java:336: error: method references are not supported in -source 1.7
            rtsBtn.setOnClickListener(this::toggle);
                                            ^
  (use -source 8 or higher to enable method references)
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

To copy to clipboard, switch view to plain text mode 

however, the project with the same lambda works in android studio. qt and A.studio have same jdk . and insist that the qt jdk version is less than 8 ???
how can this be. where am i making a mistake.

>
>
>