我目前正在将我的一个Java项目从JDK 1.5.0_14更新到JDK 8u202。
这是我的问题：
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我可以使用 JDK 1.5.0_14 和 JDK 8u202 构建项目。
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但是一旦我更改了一行代码（无论如何），我就会得到以下java.lang.AssertionError（见本文末尾）。
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当我降级到 JDK 1.5.0_14，构建项目一次并升级到 JDK 8u202 时，我可以再次构建而不会出现任何错误。
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但同样，在更改任何代码行（只有一个字符）后，我得到下面的错误。
有人知道如何解决这个问题吗？
仅供参考：我使用的是 NetBeans 8.0.2。
ant -f D:\NetBeansProjects\MyProject -Dnb.internal.action.name=build jar
init:
Deleting: D:NetBeansProjectsMyProjectbuildbuilt-jar.properties
deps-jar:
Updating property file: D:NetBeansProjectsMyProjectbuildbuilt-jar.properties
Compiling 1 source file to D:NetBeansProjectsMyProjectbuildclasses
An exception has occurred in the compiler (1.8.0_202). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.AssertionError: the -J flag should be caught by the launcher.
at com.sun.tools.javac.main.Option$20.process(Option.java:331)
at com.sun.tools.javac.main.Main.processArgs(Main.java:260)
at com.sun.tools.javac.main.Main.compile(Main.java:414)
at com.sun.tools.javac.main.Main.compile(Main.java:381)
at com.sun.tools.javac.main.Main.compile(Main.java:370)
at com.sun.tools.javac.main.Main.compile(Main.java:361)
at com.sun.tools.javac.Main.compile(Main.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:56)
at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1159)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:935)
at org.netbeans.modules.java.source.ant.JavacTask.execute(JavacTask.java:145)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:396)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:435)
at org.apache.tools.ant.Target.performTasks(Target.java:456)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:286)
at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:555)
at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)
D:NetBeansProjectsMyProjectnbprojectbuild-impl.xml:910: The following error occurred while executing this line:
D:NetBeansProjectsMyProjectnbprojectbuild-impl.xml:300: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 0 seconds)
这是我的构建 impl 中的编译和 JAR 构建部分.xml
<!--
===================
COMPILATION SECTION
===================
-->
<target name="-deps-jar-init" unless="built-jar.properties">
<property location="${build.dir}/built-jar.properties" name="built-jar.properties"/>
<delete file="${built-jar.properties}" quiet="true"/>
</target>
<target if="already.built.jar.${basedir}" name="-warn-already-built-jar">
<echo level="warn" message="Cycle detected: MyProject was already built"/>
</target>
<target depends="init,-deps-jar-init" name="deps-jar" unless="no.deps">
<mkdir dir="${build.dir}"/>
<touch file="${built-jar.properties}" verbose="false"/>
<property file="${built-jar.properties}" prefix="already.built.jar."/>
<antcall target="-warn-already-built-jar"/>
<propertyfile file="${built-jar.properties}">
<entry key="${basedir}" value=""/>
</propertyfile>
</target>
<target depends="init,-check-automatic-build,-clean-after-automatic-build" name="-verify-automatic-build"/>
<target depends="init" name="-check-automatic-build">
<available file="${build.classes.dir}/.netbeans_automatic_build" property="netbeans.automatic.build"/>
</target>
<target depends="init" if="netbeans.automatic.build" name="-clean-after-automatic-build">
<antcall target="clean"/>
</target>
<target depends="init,deps-jar" name="-pre-pre-compile">
<mkdir dir="${build.classes.dir}"/>
</target>
<target name="-pre-compile">
<!-- Empty placeholder for easier customization. -->
<!-- You can override this target in the ../build.xml file. -->
</target>
<target if="do.depend.true" name="-compile-depend">
<pathconvert property="build.generated.subdirs">
<dirset dir="${build.generated.sources.dir}" erroronmissingdir="false">
<include name="*"/>
</dirset>
</pathconvert>
<j2seproject3:depend srcdir="${src.dir}:${build.generated.subdirs}"/>
</target>
<target depends="init,deps-jar,-pre-pre-compile,-pre-compile, -copy-persistence-xml,-compile-depend" if="have.sources" name="-do-compile">
<j2seproject3:javac gensrcdir="${build.generated.sources.dir}"/>
<copy todir="${build.classes.dir}">
<fileset dir="${src.dir}" excludes="${build.classes.excludes},${excludes}" includes="${includes}"/>
</copy>
</target>
<target if="has.persistence.xml" name="-copy-persistence-xml">
<mkdir dir="${build.classes.dir}/META-INF"/>
<copy todir="${build.classes.dir}/META-INF">
<fileset dir="${meta.inf.dir}" includes="persistence.xml orm.xml"/>
</copy>
</target>
<target name="-post-compile">
<!-- Empty placeholder for easier customization. -->
<!-- You can override this target in the ../build.xml file. -->
</target>
<target depends="init,deps-jar,-verify-automatic-build,-pre-pre-compile,-pre-compile,-do-compile,-post-compile" description="Compile project." name="compile"/>
<target name="-pre-compile-single">
<!-- Empty placeholder for easier customization. -->
<!-- You can override this target in the ../build.xml file. -->
</target>
<target depends="init,deps-jar,-pre-pre-compile" name="-do-compile-single">
<fail unless="javac.includes">Must select some files in the IDE or set javac.includes</fail>
<j2seproject3:force-recompile/>
<j2seproject3:javac excludes="" gensrcdir="${build.generated.sources.dir}" includes="${javac.includes}" sourcepath="${src.dir}"/>
</target>
<target name="-post-compile-single">
<!-- Empty placeholder for easier customization. -->
<!-- You can override this target in the ../build.xml file. -->
</target>
<target depends="init,deps-jar,-verify-automatic-build,-pre-pre-compile,-pre-compile-single,-do-compile-single,-post-compile-single" name="compile-single"/>
<!--
====================
JAR BUILDING SECTION
====================
-->
<target depends="init" name="-pre-pre-jar">
<dirname file="${dist.jar}" property="dist.jar.dir"/>
<mkdir dir="${dist.jar.dir}"/>
</target>
<target name="-pre-jar">
<!-- Empty placeholder for easier customization. -->
<!-- You can override this target in the ../build.xml file. -->
</target>
<target depends="init" if="do.archive" name="-do-jar-create-manifest" unless="manifest.available">
<tempfile deleteonexit="true" destdir="${build.dir}" property="tmp.manifest.file"/>
<touch file="${tmp.manifest.file}" verbose="false"/>
</target>
<target depends="init" if="do.archive+manifest.available" name="-do-jar-copy-manifest">
<tempfile deleteonexit="true" destdir="${build.dir}" property="tmp.manifest.file"/>
<copy file="${manifest.file}" tofile="${tmp.manifest.file}"/>
</target>
<target depends="init,-do-jar-create-manifest,-do-jar-copy-manifest" if="do.archive+main.class.available" name="-do-jar-set-mainclass">
<manifest file="${tmp.manifest.file}" mode="update">
<attribute name="Main-Class" value="${main.class}"/>
</manifest>
</target>
<target depends="init,-do-jar-create-manifest,-do-jar-copy-manifest" if="do.archive+profile.available" name="-do-jar-set-profile">
<manifest file="${tmp.manifest.file}" mode="update">
<attribute name="Profile" value="${javac.profile}"/>
</manifest>
</target>
<target depends="init,-do-jar-create-manifest,-do-jar-copy-manifest" if="do.archive+splashscreen.available" name="-do-jar-set-splashscreen">
<basename file="${application.splash}" property="splashscreen.basename"/>
<mkdir dir="${build.classes.dir}/META-INF"/>
<copy failonerror="false" file="${application.splash}" todir="${build.classes.dir}/META-INF"/>
<manifest file="${tmp.manifest.file}" mode="update">
<attribute name="SplashScreen-Image" value="META-INF/${splashscreen.basename}"/>
</manifest>
</target>
<target depends="init,-init-macrodef-copylibs,compile,-pre-pre-jar,-pre-jar,-do-jar-create-manifest,-do-jar-copy-manifest,-do-jar-set-mainclass,-do-jar-set-profile,-do-jar-set-splashscreen" if="do.mkdist" name="-do-jar-copylibs">
<j2seproject3:copylibs manifest="${tmp.manifest.file}"/>
<echo level="info">To run this application from the command line without Ant, try:</echo>
<property location="${dist.jar}" name="dist.jar.resolved"/>
<echo level="info">${platform.java} -jar "${dist.jar.resolved}"</echo>
</target>
<target depends="init,compile,-pre-pre-jar,-pre-jar,-do-jar-create-manifest,-do-jar-copy-manifest,-do-jar-set-mainclass,-do-jar-set-profile,-do-jar-set-splashscreen" if="do.archive" name="-do-jar-jar" unless="do.mkdist">
<j2seproject1:jar manifest="${tmp.manifest.file}"/>
<property location="${build.classes.dir}" name="build.classes.dir.resolved"/>
<property location="${dist.jar}" name="dist.jar.resolved"/>
<pathconvert property="run.classpath.with.dist.jar">
<path path="${run.classpath}"/>
<map from="${build.classes.dir.resolved}" to="${dist.jar.resolved}"/>
</pathconvert>
<condition else="" property="jar.usage.message" value="To run this application from the command line without Ant, try:${line.separator}${platform.java} -cp ${run.classpath.with.dist.jar} ${main.class}">
<isset property="main.class.available"/>
</condition>
<condition else="debug" property="jar.usage.level" value="info">
<isset property="main.class.available"/>
</condition>
<echo level="${jar.usage.level}" message="${jar.usage.message}"/>
</target>
<target depends="-do-jar-copylibs" if="do.archive" name="-do-jar-delete-manifest">
<delete>
<fileset file="${tmp.manifest.file}"/>
</delete>
</target>
<target depends="init,compile,-pre-pre-jar,-pre-jar,-do-jar-create-manifest,-do-jar-copy-manifest,-do-jar-set-mainclass,-do-jar-set-profile,-do-jar-set-splashscreen,-do-jar-jar,-do-jar-delete-manifest" name="-do-jar-without-libraries"/>
<target depends="init,compile,-pre-pre-jar,-pre-jar,-do-jar-create-manifest,-do-jar-copy-manifest,-do-jar-set-mainclass,-do-jar-set-profile,-do-jar-set-splashscreen,-do-jar-copylibs,-do-jar-delete-manifest" name="-do-jar-with-libraries"/>
<target name="-post-jar">
<!-- Empty placeholder for easier customization. -->
<!-- You can override this target in the ../build.xml file. -->
</target>
<target depends="init,compile,-pre-jar,-do-jar-without-libraries,-do-jar-with-libraries,-post-jar" name="-do-jar"/>
<target depends="init,compile,-pre-jar,-do-jar,-post-jar" description="Build JAR." name="jar"/>
你好马拉维 我不知道它是否有帮助，但如果你有一个 ant 项目，问题可能出在 ant 项目的属性文件上。如果您有它，请检查它以查看版本是否正确并且一切正常。
我终于设法编译了它。这是我所做的：
-
我将源/二进制格式更改为JDK 8。有关如何执行此操作，请参阅使用 NetBeans 8 但低于 Lambda 表达式的编译错误。我仍然无法编译它（在 NetBeans 8.0.2 中）。
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我安装了 NetBeans IDE 10.0 并在那里打开了该项目。然后它编译没有任何问题。
所以这似乎是 NetBeans 中的一个问题。