Eclipse的火星：ANT不支持JDK 1.6了吗？ [英] Eclipse Mars: ANT doesn't support JDK 1.6 anymore?

问题描述

当我使用JDK6在Eclipse中调用火星Ant脚本（运行方式> Ant构建...> JRE>独立JRE），我得到以下错误消息：

When I use JDK6 for calling an ANT script in Eclipse Mars (Run as > Ant Build ... > JRE > Separate JRE), I get following error message:

问题发生： JRE版本低于1.7，不支持

这是唯一的错误或故意？我找不到在Eclipse中对应的bug报告。所以Eclipse的下降Java 6的支持ANT？！

Is this only a bug or intentionally? I can't find a corresponding bug report at Eclipse. So Eclipse dropped Java 6 support for ANT?!

• 截图：选择JDK 1.6作为运行时JRE ANT


• 截图：错误执行Ant脚本时，

• Screenshot: Choosing JDK 1.6 as Runtime JRE for ANT
• Screenshot: Error when executing ANT script

推荐答案

我们固定的自定义ANT插件的问题。这是一个替代火星捆绑的ANT插件。原来的插件不支持Java＆LT; 7，因为它是用Java 7的语法编写上面还有Java版本的支票。这是很容易更换java7目录语法与> = 5兼容，并除去Java 7的检查。

We fixed the problem with a custom ANT plugin. It's a replacement of the Mars bundled ANT plugin. The original plugin didn't support Java < 7 because it was written with Java 7 syntax and it had a check for Java version. It was easy to replace Java7 syntax to be compatible with >= 5 and to remove the Java 7 check.

这两个语法问题是：

• 钻石运营商，例如列表与LT;为MyObject＆GT;名单=新的ArrayList＆LT;＆GT;（）;


• 尝试-与资源，例如尝试（InputStream的流= createInputStream（））{...}

• Diamond operator, e.g. List<MyObject> list = new ArrayList<>();
• try-with-resources, e.g. try (InputStream stream = createInputStream()) { ...}

有关钻石经营者向后兼容性：

Backwards compatibility for Diamond operator:

List<MyObject> list = new ArrayList<MyObject>();

和尝试，具有资源：

and for try-with-resources:

InputStream stream;

try
{
  ...
}
finally
{
   stream.close();
}

我们替换我们的自定义插件捆绑的插件后，有可能启动一个定制的JRE一个Ant任务，像往常一样。

After we replaced the bundled plugin with our custom plugin, it was possible to start an ANT task with a custom JRE, as usual.

这是可能的创建与Eclipse的Git代码库的原始代码自己的Ant插件：的 http://git.eclipse.org/c/platform/eclipse.platform.git/refs/tags （使用标记ID：I20150430-1445），或者用我的pre-编译包：火星的Eclipse插件ANT用的Java＆LT支持; 7

It's possible to create your own ANT plugin with original sources from Eclipse git repository: http://git.eclipse.org/c/platform/eclipse.platform.git/refs/tags (use Tag ID: I20150430-1445) or to use my pre-compiled bundle: Eclipse Mars ANT plugin with support for Java < 7

安装很简单：

• 下载zip压缩包*，其中的内容解压到＆lt; eclipse_dir方式＆gt; /插件


• 先从参数-clean日食（仅一次）


• 配置JRE6您的Ant任务，通过的外部材料工具配置... 的

• Download the zip archive*, extract the content to <eclipse_dir>/plugins.
• Start eclipse with parameter -clean (only once)
• Configure JRE6 for your ANT task, via Externals Tool configuration...

关于解决方案的更多细节rel=\"nofollow\">这个博客帖子。

More details about the solution can be found in this blog post.

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