After downloading and compiling the following Telegram Bot using “mvn compile -X -e“:
The following maven compilation error has puzzled me:
[INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] Source option 5 is no longer supported. Use 8 or later. [ERROR] Target option 5 is no longer supported. Use 8 or later. [INFO] 2 errors [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.586 s [INFO] Finished at: 2024-04-29T21:59:38+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project zauredu_bot: Compilation failure: Compilation failure: [ERROR] Source option 5 is no longer supported. Use 8 or later. [ERROR] Target option 5 is no longer supported. Use 8 or later. .... Compilation failure at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192) at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105) at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957) at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289) at org.apache.maven.cli.MavenCli.main (MavenCli.java:193) at jdk.internal.reflect.DirectMethodHandleAccessor.invoke (DirectMethodHandleAccessor.java:103) at java.lang.reflect.Method.invoke (Method.java:580) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282) at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406) at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347) Caused by: org.apache.maven.plugin.compiler.CompilationFailureException: Compilation failure at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:858) at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:129) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156) at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305) at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192) at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105) at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957) at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289) at org.apache.maven.cli.MavenCli.main (MavenCli.java:193) at jdk.internal.reflect.DirectMethodHandleAccessor.invoke (DirectMethodHandleAccessor.java:103) at java.lang.reflect.Method.invoke (Method.java:580) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282) at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406) at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347) [ERROR] [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Asking ChatGPT does not give me the right answer either:
So finally after some googling:
The explanation of the “source” and “target” compatibility version is explained here:
And the proper way to configure the pom.xml is explained here:
And so for our pom.xml, the following changes are needed – insert the following into pom.xml:
<properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties>
Resulting in the following pom.xml:
After compilation using “mvn compile -X -e”:
[DEBUG] (f) compilerId = javac
[DEBUG] (f) debug = true
[DEBUG] (f) failOnError = true
[DEBUG] (f) forceJavacCompilerUse = false
[DEBUG] (f) fork = false
[DEBUG] (f) generatedSourcesDirectory = /home/tthtlc/telegram-bot-java-tutorial/target/generated-sources/annotations
[DEBUG] (f) mojoExecution = org.apache.maven.plugins:maven-compiler-plugin:3.1:compile {execution: default-compile}
[DEBUG] (f) optimize = false
[DEBUG] (f) outputDirectory = /home/tthtlc/telegram-bot-java-tutorial/target/classes
[DEBUG] (f) projectArtifact = zaurkhb.com:zauredu_bot:jar:1.0-SNAPSHOT
[DEBUG] (f) showDeprecation = false
[DEBUG] (f) showWarnings = false
[DEBUG] (f) skipMultiThreadWarning = false
[DEBUG] (f) source = 1.8
[DEBUG] (f) staleMillis = 0
[DEBUG] (f) target = 1.8
[DEBUG] (f) useIncrementalCompilation = true
[DEBUG] (f) verbose = false
[DEBUG] (f) mavenSession = org.apache.maven.execution.MavenSession@42435b98
[DEBUG] (f) session = org.apache.maven.execution.MavenSession@42435b98
[DEBUG] -- end configuration --
....
....
[INFO] Nothing to compile - all classes are up to date
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.439 s
So successful compilation finally.
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