blocks|key|288701|text|考虑到您提供的信息有限，这很难回答。以下是一些建议：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|288702|288703|确保在您的生成路径中有适当的android.jar，因为这是java.lang.Object的来源。|unordered-list-item|offset|length|style|CODE|288704|执行项目>清理，以确保您有1.6个.class文件，以防这是问题的一部分。|288705|尝试从头开始创建新项目，并查看是否可以使用。<代码>H29<代码>F210|288706|288707|entityMap^0|0|0|E|B|U|G|0|H|6|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|S|8|@$F|T|G|U|H|I]|$F|V|G|W|H|I]]|9|@]|A|$]]|$1|J|3|K|5|E|7|X|8|@$F|Y|G|Z|H|I]]|9|@]|A|$]]|$1|L|3|M|5|E|7|10|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|P|$]]

That is rather difficult to answer, given the limited information you have supplied. Here are some suggestions:

<ul>
<li>Make sure that an appropriate <code>android.jar</code> is in your build path, since that is where <code>java.lang.Object</code> would come from.</li>
<li>Do a Project > Clean, to make sure you have 1.6 <code>.class</code> files, in case that is part of the problem.</li>
<li>Try creating a new project from scratch and see if that works.</li>
</ul>

blocks|key|3006391|text|对我来说，问题是在项目设置-+Android选项卡中，我没有选择Android版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3006392|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

For me, the problem was that in the Project settings - Android tab, I had no Android version selected.

blocks|key|291999|text|即使我选择了一个有效的目标，我也遇到了这个问题。我通过更改到不同的目标来修复它，应用更改，然后再更改回来。这似乎已经解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|292000|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had this problem even though I had a valid target selected. I fixed it by changing to a different target, applying changes and then changing back. That seems to have sorted it.

blocks|key|289751|text|项目->属性->安卓:选择另一个安卓目标(我的例子是安卓4.0.3)+->+Apply+changes。然后再次选择默认的Android+Target，仅此而已。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|289752|希望这能有所帮助。|289753|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Project->Properties->Android : Select another Android Target (in my case Android 4.0.3) -> Apply changes.
THEN select again your default Android Target, and that is all.

Hope this help.

blocks|key|288830|text|这个问题是由于我的旧项目在一台没有安装旧版Android+SDK的新机器上造成的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|288831|要修复此问题，只需进入project.properties并查看您的旧版本号：|288832|#+Project+target.
target=Google+Inc.:Google+APIs:3|code-block|syntax|javascript|288833|只需更新版本号，如下所示：|288834|#+Project+target.
target=Google+Inc.:Google+APIs:7|288835|然后，您会发现Eclipse选择了正确的SDK版本并开始工作。|288836|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

This problem was caused for my old projects on a new machine that did not have an older Android SDK installed.

To fix, simply go into project.properties and observe your old version number:

<pre><code># Project target.
target=Google Inc.:Google APIs:3
</code></pre>

Simply update the version number, like so:

<pre><code># Project target.
target=Google Inc.:Google APIs:7
</code></pre>

You will find that Eclipse then picks up the right SDK version and starts working.

blocks|key|292133|text|无需从头开始创建新项目。如果“修复项目属性”或“添加库>+Android+Classpath+Container”不起作用，则项目文件夹的根目录中可能缺少"project.properties“文件。添加该文件并在项目属性中设置Android目标，重新添加Android库，再次修复项目属性，Android系统库现在应该包含在您的项目中。重新构建，你就可以开始了！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|292134|从我个人的经验来看。对于自我记录也是如此，因为这种情况在我身上经常发生：|292135|Eclipse+Helios+SR2
Android+SDK+R.20
Android+NDK+R8b
OSX+10.7.4|code-block|syntax|javascript|292136|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

No need to create a new project from scratch. If "Fix Project Properties" or "Add Library > Android Classpath Container" does not work, "project.properties" file might be missing in the root of your project folder. Add that file and set the Android target in the Project properties, re-add the Android Library, Fix Project Properties again, Android System Library should now be included in your project. Rebuilt, and you are good to go!

From my personal experience. For self documenting as well, since this happens quite often on me:

<pre><code>Eclipse Helios SR2
Android SDK R.20
Android NDK R8b
OSX 10.7.4
</code></pre>

blocks|key|3220737|text|在我的例子中，这个问题与properties>android>library中缺少库路径有关。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3220738|我清除并重新输入了project.properties文件中的库路径|offset|length|style|CODE|3220739|entityMap^0|0|9|I|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

In my case the issue was related with the missing library path from the properties>android>library.

I cleared and re-entered the library paths in <code>project.properties</code> file

blocks|key|3220745|text|有确切的问题作为原始问题！除了关闭我的项目/Eclipse什么也没做，在重新打开时被所有的错误吓到了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3220746|在我的例子中，我只需要更改/切换工作空间。o_O当我重新选择我原来的工作区时，我发现一切都解决了，并且又可以工作了！|3220747|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Had EXACT issue as the original Question! 
Had not done anything but close my project/Eclipse and was startled by all the errors upon reopening.

In my case I only needed to do was change/switch workspaces. o_O
When I reselected my original workspace I then found everything was resolved and working again!

blocks|key|288753|text|请查看您的.classpath文件，并查看是否所有参考库项目或源项目都添加了正确的路径和名称。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|288754|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Please see your .classpath file, and see if all reference lib projects or src projects are added with correct path and name.

blocks|key|3006453|text|SDK+tl；dr：还会检查"local.properties“文件中陈旧的路径。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3006454|下面是我如何修复它的:我看了Richard+Le+Mesurier给出的答案，也检查了CommonsWare提到的Window+>+Preferences+>+Android中Android+SDK的路径(因为我之前确实更改了SDK目录)，但是仍然找不到它。|3006455|然后我注意到我有一个名为"local.properties“的文件，它引用了"sdk.dir”的旧位置。我将其更改为新的位置，以匹配窗口>首选项>+Android中的位置。然后在project+>+Properties+>+Android中取消选择构建目标，点击Apply，重新选择它，点击OK并清除项目。这起作用了！谢谢大家！|3006456|entityMap^0|12|3|0|0|3L|0|0|4K|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|K|$]]

tl;dr: also check for stale SDK paths in the "local.properties" file.

Here's how I fixed it: I went through the answer given by Richard Le Mesurier, and also checked the path to the Android SDK in Window > Preferences > Android as mentioned by CommonsWare (since I did indeed change the SDK directory a while ago), however it still couldn't find it. 

Then I noticed that I had a file called "local.properties" which referenced the old location for "sdk.dir". I changed that to the new location to match what was in Window > Preferences > Android. Then deselected the build target in Project > Properties > Android, hit Apply, re-selected it, and hit OK and cleaned the project. That worked! Thanks all!

blocks|key|286956|text|我还改变了这个问题，并通过更改项目属性中的android选择来解决它。我的错误是因为项目无法从android+SDK中找到合适的库。然后使用项目右键中的android修复工具修复项目，然后进行清理，然后进行更正。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|286957|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

i have also encoutered this and solve it by changing the android choice in project properties. My error is because the project can't find proper lib from the android SDK. Then fix the project using android fix tool in right click of project, clean it and then correct.

blocks|key|3006628|text|这个问题不知从何而来。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3006629|我用鼠标右键点击项目，选择Android+Tools，Add+support+Library。|3006630|丢失的是android.jar，这会恢复它。|3006631|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I had this problem come out of nowhere. 

What worked for me was to right-click the project, select Android Tools, Add support Library..

It is the android.jar that is missing, and this restores it.

blocks|key|3006683|text|另一种可能的解释是Eclipse忘记了它的Android插件。如果您切换工作空间，就会发生这种情况，就像我的情况一样。我试图重新导入一个现有的Android项目，但它找不到基本的java系统库，因为它指向标准的android+jar。重新安装android插件(帮助->Eclipse+Marketplace，然后搜索"Android“并选择"Android+Development+Tools+for+Eclipse")可以修复这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3006684|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Another possible explanation is that Eclipse has forgotten its Android plugin. This can happen if you switch workspaces, as happened in my case. I tried to re-import an existing Android project, and it couldn't find the basic java system libraries, since it was pointing to the standard android jars. Reinstalling the android plugin (Help->Eclipse Marketplace, then search for "Android" and pick "Android Development Tools for Eclipse") fixes it.

blocks|key|3220671|text|我右键单击项目并将其关闭。然后又重新打开了。这就解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3220672|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I right clicked project and Closed it. Then reopened it. That fixed the problem.

blocks|key|287069|text|在我的例子中，ADT需要更新(在Eclipse菜单Help/Check+for+Updates或Help/Install+New+Software中)。检查你的ADT！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|287070|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case, ADT needed update (in Eclipse menu Help/Check for Updates, or Help/Install New Software). Check your ADT!

blocks|key|288927|text|我尝试了这里提到的几个选项，但都不起作用。然后我重新启动了我的Ubuntu机器，并再次启动了Eclipse。然后一切都解决了。只需重新启动。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|288928|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I tried several options mentioned here, but nothing worked. Then I rebooted my Ubuntu machine and started Eclipse again. Then everything was solved. Just reboot.

blocks|key|287125|text|java.lang.Object+cannot+be+resolved+in+Eclipse|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|287126|在我升级ADT之后，这个问题最近开始出现了。如上所述，当我取消选中%2BApply/check%2BApply+project+build+target时，它会有所帮助，但问题最终会再次出现。因此，我只是显式地将android.jar添加到构建中。这是.classpath文件中的条目|287127|++++<classpathentry+kind="lib"+path="/Applications/adt-bundle-mac-x86_64/sdk/platforms/android-19/android.jar"/>|code-block|syntax|javascript|287128|这在很大程度上是一种变通方法，因为我必须在每次更改SDK版本时更改它，但至少不需要在重新启动Eclipse时使用属性来构建它。|287129|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/12073222/java-lang-object-cannot-be-resolved-in-eclipse^0|0|1A|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

<a href="https://stackoverflow.com/questions/12073222/java-lang-object-cannot-be-resolved-in-eclipse">java.lang.Object cannot be resolved in Eclipse</a>

This problems started to appear recently for me after I upgraded ADT. As suggested above, when I uncheck+Apply/check+Apply project build target it would help , but the problem would come back eventually. So instead I just added android.jar explicitly to the build. This is the entry in the .classpath file

<pre><code> &lt;classpathentry kind="lib" path="/Applications/adt-bundle-mac-x86_64/sdk/platforms/android-19/android.jar"/&gt;
</code></pre>

This is more of a workaround as I would have to change it every time I change the SDK version, but at least no need to play with properties to get it to build when I restart Eclipse.

blocks|key|3006369|text|试着清理你的项目，这可能会有帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3006370|在eclipse上，单击上面名为"Project“的菜单项，然后单击"Clean+Build”。在该屏幕上，选中“清除下面选定的项目”复选框，选择给您带来问题的项目，然后单击确定。|3006371|它将重新构建您的项目，这通常有助于处理像这样的奇怪的eclipse错误。|3006372|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Try cleaning your project, that might help.

On eclipse, click on the menu item above called "Project", then click on "Clean Build".
On that screen, check the checkbox that says "Clean projects selected below", select the project(s) that's giving you problems, and click Ok.

It will rebuild your project and that usually helps with strange eclipse errors like this.

blocks|key|292048|text|尝试像这样创建新项目，然后尝试它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|292049|​|292050|📷|atomic|offset|length|292051|292052|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/2f777096e47e5f44ba099e2417e43a58.jpeg|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

Try to create new project like this then try it

<img src="https://i.stack.imgur.com/2pnMa.jpg" alt="Screenshot of &#39;New Android Project&#39; window">

blocks|key|3220335|text|在我的例子中，我的project.properties将android-8列为目标系统，但我并没有安装它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3220336|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case, my project.properties had android-8 listed as the target, which I didn't have installed.

blocks|key|288822|text|我的案例没有创建正确的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|288823|AVD创建完成后，进入工程属性，找到Android，选择合适的SDK版本，进入JAVA构建路径，删除库(无法获取工程系统库)，添加android库。|288824|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

my case was not created the right AVD

after AVD created, go to project Property and find Android, select the right SDK version and then go to JAVA Build Path, delete the library (Unable to get system library for project) and add android library.

blocks|key|289732|text|正如我之前尝试过的，最好的方法是创建一个新项目并选择：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|289733|从现有源代码创建一个项目，并选择要导入的android项目的位置，然后，您将看到android的构建目标，如:+2.3.3或2.1.|289734|只需选择其中之一，然后完成！|289735|你完蛋了！..|289736|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

The best way here as I tried before, is to create a new project and choose : 

create a project from an existing source and choose the location of the android project that you want to import, then next, you will see the build target of android like : 2.3.3 or 2.1 ..

Just choose one of them then finish! 

You are done! ..

blocks|key|287072|text|删除项目中的文件夹库|type|unstyled|depth|inlineStyleRanges|entityRanges|data|287073|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Remove the folder libs in your project

blocks|key|292200|text|有同样的问题(我的java源文件上到处都是红色错误)，解决方案很简单：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|292201|在清单文件中提升版本到android:minSdkVersion="8“(我创建了一个新的空项目并查看了它的清单文件)(它最初是android:minSdkVersion="4”，因为我想支持旧的安卓|292202|+2.右键单击项目并选择Build|unordered-list-item|292203|
|292204|步骤3.只是为了安全:在菜单上:项目清理并检查我的项目|292205|292206|步骤4:最后我在清单文件中改回到android:minSdkVersion="4“，它没有错误。|292207|292208|希望它能为你工作。|292209|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|W|8|@]|9|@]|A|$]]|$1|K|3|H|5|6|7|X|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|Y|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

Had the same issue (red erros all over my java source files)
Solution was simple: 

<ul>
<li>step 1. In the manifest file raise the version to android:minSdkVersion="8"
(I created a new empty project and looked in it's manifest file)
(it was originally android:minSdkVersion="4" because i want to support older android versions.)</li>
<li>step 2. right click the project and select Build</li>
<li>step 3. just to be safe: On the menu: Project Clean and check my project</li>
<li>step 4: finally I changed back In the manifest file to android:minSdkVersion="4" and it had no errors. </li>
</ul>

Hope it works for you.

blocks|key|3006908|text|在我的例子中，JRE丢失了(从Eclipse选项中消失)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3006909|为了解决这个问题，我只需在Windows+->+Preferences+->+Java+->+Installed+JRE下重新添加JRE即可。|3006910|我的矿场位于/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home|3006911|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

In my case, The JRE went missing (disapear from Eclipse option). 

All I did to fix this is re-add the JRE under 
Windows -> Preferences -> Java -> Installed JREs.

mine was located at /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

blocks|key|288977|text|帮助我的方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|288978|从正在工作的项目中取出以下文件：workspace/.metadata/.plugins/org.eclipse.core.resources/.projects/Working-project-name/.indexes|offset|length|style|CODE|288979|Replace+|unordered-list-item|288980|：workspace/.metadata/.plugins/org.eclipse.core.resources/.projects/Broken-project-name/.indexes|ordered-list-item|288981|288982|288983|entityMap^0|0|G|2N|0|0|1|2M|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|W|8|@$D|X|E|Y|F|G]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|Q|$]]

The way that helped me.

<ol>
<li>Take the following file from the working project:
<code>workspace/.metadata/.plugins/org.eclipse.core.resources/.projects/Working-project-name/.indexes</code></li>
<li>Replace the broken project file:
<code>workspace/.metadata/.plugins/org.eclipse.core.resources/.projects/Broken-project-name/.indexes</code></li>
</ol>

Today I upgraded to Android SDK 2.3 and I also upgraded the Eclipse Plugin Androi Developer Tools 8.0 (from 0.9.9). I also upgraded my Java Development Kit to 1.6_22.

Now in Eclipse I get many errors in all my Android projects.

The error messages are like:

<blockquote>
 The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files.
</blockquote>

How can I fix this so I can use my Android projects again?

In the Build Path for these projects, I don't have any references to an <code>android.jar</code> but a message:

<blockquote>
 Unable to get system library for project
</blockquote>

"Unable to get system library for project" after I upgraded to Android SDK 2.3 and ADT 8.0

Android

Windows

Eclipse

Ubuntu

Java

今天我升级到了Android SDK 2.3，我还升级了Eclipse插件Androi Developer Tools 8.0 (从0.9.9)。我还将我的Java Development Kit升级到了1.6_22。现在在Eclipse中，我在我所有的安卓项目中都得到了很多错误。错误消息如下：无法解析类型java.lang.Object的。它是从所需的.class文件间接引用的。我怎样才能修复这

问升级到Android SDK 2.3和ADT 8.0后，"Unable to get system library for project“
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