[jira] [Commented] (MANTRUN-220) java.lang.UnsupportedClassVersionError: Bad version number in .class file

["Michael Osipov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MANTRUN-220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16888344#comment-16888344 ] 

Michael Osipov commented on MANTRUN-220:
----------------------------------------

I do not understand the problem.

> java.lang.UnsupportedClassVersionError: Bad version number in .class file
> -------------------------------------------------------------------------
>
>                 Key: MANTRUN-220
>                 URL: https://issues.apache.org/jira/browse/MANTRUN-220
>             Project: Maven Antrun Plugin
>          Issue Type: Bug
>    Affects Versions: 1.8
>         Environment: windows10+ Maven 3.6.0+java 11
>            Reporter: mengln
>            Priority: Major
>
> pom.xml:
> <plugin>
>  <artifactId>maven-antrun-plugin</artifactId>
>  <executions>
>  <execution>
>  <id>install with JDK5</id>
>  <phase>install</phase>
>  <configuration>
>  <tasks>
>  <exec executable="${basedir}/mvn_jdk5.bat" output="log.txt" failonerror="true">
>  <arg value="install"/>
>  <arg value="..
>  a-geronimo"/>
>  </exec>
>  </tasks>
>  </configuration>
>  <goals>
>  <goal>run</goal>
>  </goals>
>  </execution>
>  <execution>
>  <id>clean with JDK5</id>
>  <phase>clean</phase>
>  <configuration>
>  <tasks>
>  <exec executable="${basedir}/mvn_jdk5.bat" output="log.txt" failonerror="true">
>  <arg value="clean"/>
>  <arg value="..
>  a-geronimo"/>
>  </exec>
>  </tasks>
>  </configuration>
>  <goals>
>  <goal>run</goal>
>  </goals>
>  </execution>
>  </executions>
>  </plugin>
>  
>  mvn_jdk1.5bat:
> if "%JAVA5_HOME%" == "" (
>  echo "ERROR:Please Set JAVA5_HOME"
>  exit /b 1
>  )
>  Set JAVA_HOME=%JAVA5_HOME%
>  Set MVN_GOAL=%1
>  if "%2" neq "" (
>  Set WORK_DIR=%2 
>  ) else (
>  Set WORK_DIR=.\ 
>  )
>  cd %WORK_DIR%
> REM [maven ]
>  echo JAVA_HOME : "%JAVA_HOME%"
>  echo Work Directory : "%WORK_DIR%"
>  echo Command : mvn %MVN_GOAL%
> call mvn.cmd %MVN_GOAL%
> echo ErrorLevel:%ERRORLEVEL%
> if ERRORLEVEL 1 (
>  exit /b %ERRORLEVEL%
> )
>  
> Previously used is java6+maven2.2.1, you need to make some projects compile with java5, compile without problems. Now need to change the version of java, use java11+maven3.6.0, compile problems, query maven3.6.0 support java1.7 and above, but change java_home to 1.7 will give an error: Java heap space.
>  
> Error message:
> JAVA_HOME : "G:\buildtool\jdk1.5.0_18"
>  Work Directory : "..
>  a-geronimo "
>  Command : mvn clean
>  java.lang.UnsupportedClassVersionError: Bad version number in .class file
>  at java.lang.ClassLoader.defineClass1(Native Method)
>  at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
>  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
>  at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
>  at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
>  at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
>  at java.security.AccessController.doPrivileged(Native Method)
>  at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
>  at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>  at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
>  Exception in thread "main" ErrorLevel:1
>  



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