即使在java错误之后，Ant构建也成功了，如何使其失败？

<target name="fail-build">
    <fail message="Build failed due to custom error."/>
</target>

<target name="build">
    <!-- 构建过程 -->
    <fail-build/>
</target>

<project name="example" default="build" failonerror="true">
    <!-- 构建过程 -->
</project>

<target name="check-java-error">
    <java classname="com.example.CheckJavaError" failonerror="false">
        <!-- Java代码检查错误 -->
    </java>
    <fail message="Build failed due to Java error." if="java.error"/>
</target>

<target name="build">
    <!-- 构建过程 -->
    <check-java-error/>
</target>