IntelliJ Error java error release version 5 not supported

Question

I m using IntelliJ IDEA Ultimate 2019 3 1  Whenever I try to start any simple Java Maven project  may it be even a simple Hello World  I get the following error   Error java  error  release version 5 not supported   Running java --version by terminal I get the following output   openjdk 11 0 5 2019-10-15 OpenJDK Runtime Environment  build 11 0 5 10-post-Ubuntu-0ubuntu1 1  OpenJDK 64-Bit Server VM  build 11 0 5 10-post-Ubuntu-0ubuntu1 1  mixed mode  sharing    Running javac --version by terminal I get the following output   javac 11 0 5   Going to the Settings of the Java Compiler   as suggested here   I see this     I tried editing the  Target bytecode version  to 1 8 but I get the following errors   Error  1  26  java  package javafx application does not exist Error  2  20  java  package javafx stage does not exist Error  4  27  java  cannot find symbol   symbol  class Application Error  12  23  java  cannot find symbol   symbol    class Stage   location  class Main Error  7  9  java  cannot find symbol   symbol    method launch java lang String      location  class Main Error  11  5  java  method does not override or implement a method from a supertype   Changing it to version 1 11 I get this error instead   Error java  Source option 5 is no longer supported  Use 6 or later    What do you think is the problem  How may I solve it

User · Answer

You should do one more change by either below approaches:

1 Through IntelliJ GUI

As mentioned by 'tataelm':

Project Structure > Project Settings > Modules > Language level: > then change to your preferred language level

2 Edit IntelliJ config file directly

Open the <ProjectName>.iml file (it is created automatically in your project folder if you're using IntelliJ) directly by editing the following line,

From: <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5">

To: <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_11">

As your approach is also meaning to edit this file. :)

Approach 1 is actually asking IntelliJ to help edit the .iml file instead of doing by you directly.

User · Answer

In my case it was enough to add this part to the pom xml file       lt build gt           lt plugins gt               lt plugin gt                   lt groupId gt org apache maven plugins lt  groupId gt                   lt artifactId gt maven-compiler-plugin lt  artifactId gt                   lt version gt 3 8 0 lt  version gt                   lt configuration gt                       lt release gt 11 lt  release gt                   lt  configuration gt               lt  plugin gt           lt  plugins gt       lt  build gt

User · Answer

The solution to the problem is already defined in some of the answers  But there is still a need to express a detail  The problem is totally related to maven  and the solution is also in the pom xml configuration  IntelliJ only reads maven configuration  and if the configuration has wrong information  IntelliJ also tries to use that  To solve the problem  as expressed in the most of the answers  just add the below properties to the pom xml of the project   lt properties gt          lt maven compiler source gt 1 8 lt  maven compiler source gt          lt maven compiler target gt 1 8 lt  maven compiler target gt    lt  properties gt   After that  on the IntelliJ side  reimport maven configuration  To reimport the maven configuration  right click on pom xml file of the project and select  Reimport  Compiler version related information in IntelliJ preferences will be automatically updated according to the values in the pom xml

User · Answer

Took me a while to aggregate an actual solution  but here s how to get rid of this compile error   Open IntelliJ preferences   Search for  quot compiler quot   or something like  quot compi quot     Scroll down to Maven -- gt java compiler  In the right panel will be a list of modules and their associated java compile version  quot target bytecode version  quot   Select a version  gt 1 5  You may need to upgrade your jdk if one is not available

User · Answer

The only working solution in my case was adding the following block to pom xml   lt build gt       lt plugins gt           lt plugin gt               lt groupId gt org apache maven plugins lt  groupId gt               lt artifactId gt maven-compiler-plugin lt  artifactId gt               lt version gt 3 8 0 lt  version gt   lt configuration gt   lt release gt 12 lt  release gt           lt  configuration gt           lt  plugin gt       lt  plugins gt   lt  build gt

User · Answer

I add the following code to my pom xml file  It solved my problem   lt properties gt       lt project build sourceEncoding gt UTF-8 lt  project build sourceEncoding gt       lt maven compiler source gt 1 8 lt  maven compiler source gt       lt maven compiler target gt 1 8 lt  maven compiler target gt   lt  properties gt

User · Answer

In IntelliJ  the default maven compiler version is less than version 5  which is not supported  so we have to manually change the version of the maven compiler  We have two ways to define version  First way   lt properties gt     lt maven compiler target gt 1 8 lt  maven compiler target gt     lt maven compiler source gt 1 8 lt  maven compiler source gt   lt  properties gt   Second way   lt build gt     lt plugins gt       lt plugin gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-compiler-plugin lt  artifactId gt           lt version gt 3 8 0 lt  version gt           lt configuration gt               lt source gt 8 lt  source gt               lt target gt 8 lt  target gt           lt  configuration gt       lt  plugin gt     lt  plugins gt   lt  build gt

User · Answer

I ve done most things you are proposing with Java compiler and bytecode and solved the problem in the past  It s been almost 1 month since I ran my Java code  and back then everything was fixed   but now the problem appeared again  Don t know why  pretty annoyed though  This time the solution was  Right click to project name - gt  Open module settings F4 - gt  Language level    and there you can define the language level your project pc is  No maven pom configuration worked for me both in the past and now and I ve already set the Java compiler and bytecode at 12

User · Answer

Within IntelliJ  open pom xml file  Add this section before  lt dependencies gt   if your file already has a  lt properties gt  section  just add the  lt maven compiler    gt  lines below to that existing section    lt properties gt       lt maven compiler source gt 1 8 lt  maven compiler source gt       lt maven compiler target gt 1 8 lt  maven compiler target gt    lt  properties gt

User · Answer

You only have to add these two lines in your pom xml  After that  your problem will be gone   lt  --pom xml-- gt   lt properties gt       lt maven compiler source gt 1 8 lt  maven compiler source gt       lt maven compiler target gt 1 8 lt  maven compiler target gt   lt  properties gt

User · Answer

If you are using spring boot as a parent  you should set the java version property  because this will automatically set the correct versions   lt properties gt      lt java version gt 11 lt  java version gt   lt  properties gt   The property defined in your own project overrides whatever is set in the parent pom  This overrides all needed properties to compile to the correct version  Some information can be found here  https   www baeldung com maven-java-version

User · Answer

If your are using IntelliJ  go to setting   gt  compiler and change the version to your current java version

User · Answer

You need to set language level  release version and add maven compiler plugin to the pom xml  lt properties gt     lt maven compiler source gt 1 8 lt  maven compiler source gt     lt maven compiler target gt 1 8 lt  maven compiler target gt   lt  properties gt    lt dependency gt     lt groupId gt org apache maven plugins lt  groupId gt     lt artifactId gt maven-compiler-plugin lt  artifactId gt     lt version gt 3 8 1 lt  version gt   lt  dependency gt

User · Answer

guys  I have also encountered this problem after having so much research on this issue I found 3 solutions to resolve this issue  Add these properties in your pom xml    Sorry for the formatting   lt properties gt  lt java version gt 1 8 lt  java version lt maven compiler version gt 3 8 1 lt  maven compiler version lt maven compiler source gt 1 8 lt  maven compiler source lt maven compiler target gt 1 8 lt  maven compiler target gt  lt java version gt 11 lt  java version gt  lt  properties gt   Delete everything in the target byte version  you can find this in the java compiler setting of the IntelliJ  Remove everything below target byte version make it empty  Find the appium version you are using in the dependency  here I am using 7 3 0 find the version of the appium you are using in the dependency in pom xml  Then write your version in the target byte version in java compiler enter image description here ENJOY THE CODE gt  gt  gt HOPE IT WORKED FOR YOU

User · Answer

By default  your  quot Project bytecode version isn t set in maven project  It thinks that your current version is 5  Solution 1  Just go to  quot Project Settings gt Build  Execution    gt compiler gt java compiler quot  and then change your bytecode version to your current java version  Solution 2  Adding below build plugin in POM file    lt properties gt           lt java version gt 1 8 lt  java version gt           lt maven compiler version gt 3 8 1 lt  maven compiler version gt           lt maven compiler source gt 1 8 lt  maven compiler source gt           lt maven compiler target gt 1 8 lt  maven compiler target gt       lt  properties gt        lt build gt           lt plugins gt               lt plugin gt                   lt groupId gt org apache maven plugins lt  groupId gt                   lt artifactId gt maven-compiler-plugin lt  artifactId gt                   lt version gt   maven compiler version  lt  version gt                   lt configuration gt                       lt source gt   java version  lt  source gt                       lt target gt   java version  lt  target gt                   lt  configuration gt               lt  plugin gt           lt  plugins gt       lt  build gt

User · Answer

I did everything above but had to do one more thing in IntelliJ  Project Structure  gt  Modules I had to change every module s  quot language level quot

User · Answer

See  https   stackoverflow com a 12900859 104891    First of all  set the language level release versions in pom xml like that     lt properties gt     lt maven compiler source gt 1 8 lt  maven compiler source gt     lt maven compiler target gt 1 8 lt  maven compiler target gt   lt  properties gt    Maven sets the default to 1 5 otherwise  You will also need to include the maven-compiler-plugin if you haven t already    lt dependency gt     lt groupId gt org apache maven plugins lt  groupId gt     lt artifactId gt maven-compiler-plugin lt  artifactId gt     lt version gt 3 8 1 lt  version gt   lt  dependency gt    Also  try to change the Java version in each of these places   File -  Project structure -  Project -  Project SDK -  11   File -  Project structure -  Project -  Project language level -  11   File -  Project structure -  Project -  Modules -  -  Sources --  11  In project -  ctrl   alt   s -  Build  Execution  Deployment -  Compiler -  Java Compiler -  Project bytecode version -  11  In project -  ctrl   alt   s -  Build  Execution  Deployment -  Compiler -  Java Compiler -  Module -  1 11

[java] IntelliJ: Error:java: error: release version 5 not supported

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