本文介绍了null JavaCompiler在Eclipse中的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我收到一些错误与我的Java编译器。我不是在Eclipse外面得到错误，但它似乎只发生在Eclipse Indigo。这不是必要的，但如果你有答案，我会非常感激它，因为它会帮助我调试，并更容易测试资源。
I am getting some errors with my Java Compiler. I am not getting errors outside of Eclipse, but it only seems to happen in Eclipse Indigo. This is not necessary, but if you have the answer, I would really appreciate it, as it would help me debug, and test the resources easier.
感谢您的阅读这个。
E：ToolProvider.getSystemJavaCompiler（）返回null。
E: The ToolProvider.getSystemJavaCompiler() returns null.
E2：
推荐答案
- 转到 Java - > 已安装的JRE 。将您的JDK添加为运行时。您可以选择选择此JDK以用于所有FUTURE项目。但是，您的选择将不会对现有项目生效。因此跳到第2步。
- 选择项目的属性。
- 在库标签下，选择JRE系统库[jreblahblahblah]和编辑
- 选择备用JRE ，然后使用下拉菜单找到您刚添加的JDK。
- 项目和重建。
- Go to Java->Installed JREs. Add your JDK as a runtime. You may choose to select this JDK to use for all your FUTURE projects. However your selection will not take effect on existing projects. Hence onto step 2.
- Select your project's properties. Select Java Build Path.
- Under the Libraries tab, select JRE System Library [jreblahblahblah] and Edit it.
- Select Alternate JRE and use the dropdown to find the JDK that you just added.
- Clean your project and rebuild.
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