Throwing ClassNotFoundException due to deleted Target folder-CodePudding

I tried adding a dependency in my pom.xml, but turns out it is not what I am looking for so I deleted it in my pom.xml.

This is what I removed

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>3.2.2</version>
            <configuration>
                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <mainClass>Log_In</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
    </plugins>
</build>

I then tried the Clean option in my Maven project in NetBeans 13 as per what I saw in a tutorial and now I lost every subfolder in my Target folder including the folder where my .class files are located. And so my project is not running anymore and is throwing a ClassNotFoundException.

Error: Could not find or load main class Log_In Caused by: java.lang.ClassNotFoundException: Log_In Command execution failed. org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1) at org.apache.commons.exec.DefaultExecutor.executeInternal (DefaultExecutor.java:404) at org.apache.commons.exec.DefaultExecutor.execute (DefaultExecutor.java:166) at org.codehaus.mojo.exec.ExecMojo.executeCommandLine (ExecMojo.java:982) at org.codehaus.mojo.exec.ExecMojo.executeCommandLine (ExecMojo.java:929) at org.codehaus.mojo.exec.ExecMojo.execute (ExecMojo.java:457) 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:972) at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293) at org.apache.maven.cli.MavenCli.main (MavenCli.java:196) at jdk.internal.reflect.DirectMethodHandleAccessor.invoke (DirectMethodHandleAccessor.java:104) at java.lang.reflect.Method.invoke (Method.java:577) 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) ------------------------------------------------------------------------ BUILD FAILURE ------------------------------------------------------------------------ Total time: 4.991 s Finished at: 2022-09-15T16:33:12 08:00 ------------------------------------------------------------------------ Failed to execute goal org.codehaus.mojo:exec-maven-plugin:3.0.0:exec (default-cli) on project Hotel_Management_System: Command execution failed.: Process exited with an error: 1 (Exit value: 1) -> [Help 1]

To see the full stack trace of the errors, re-run Maven with the -e switch. Re-run Maven using the -X switch to enable full debug logging.

I'm completely aware that this is my fault for not reading a documentation beforehand. Please help me, any help will be appreciated, thank you.

CodePudding user response：

Its completely okay during maven build process to delete and recreate the target folder.

You only lost generated class files. Your source files (.java) should still exist and if you run a full mvn clean install they will be recompiled and your target folder, .class files and jar assets recreated.