Eclipse Classic can not find java? and not run Hello World as last week

I installed Eclipse Classic (Helios) and Android Sdk and the Adt plugins as derscribed by goodle at the Android Developers site. I could immediately run Hello World perfectly. But the next time I used my computer I could run Hello World anymore and get this error message:

E/ddms: shutting down due to uncought exception
E/ddms: Bad version: standalone
java.lang.IllegalArgumentException: BadVersion: standalone
    at com.android.sdkstats.SdkStatsService.normalizeVersion<...>
    at com.android.sdkstats.SdkStatsService.doPing<...>
    at com.android.sdkstats.SdkStatsService.ping<...>
    at com.android.ddms.Main.main<Main.java:78>

And the console says:

[2010-12-22 21:38:52 - HelloAndroid] ------------------------------
[2010-12-22 2开发者_如何学运维1:38:52 - HelloAndroid] Android Launch!
[2010-12-22 21:38:52 - HelloAndroid] adb is running normally.
[2010-12-22 21:38:52 - HelloAndroid] Performing org.example.hello.Hello activity launch
[2010-12-22 21:38:52 - HelloAndroid] Automatic Target Mode: launching new emulator with compatible AVD 'AnnasPhone'
[2010-12-22 21:38:52 - HelloAndroid] Launching a new emulator with Virtual Device 'AnnasPhone'
[2010-12-22 21:38:58 - HelloAndroid] New emulator found: emulator-5554
[2010-12-22 21:38:58 - HelloAndroid] Waiting for HOME ('android.process.acore') to be launched...
[2010-12-22 21:39:39 - HelloAndroid] HOME is up on device 'emulator-5554'
[2010-12-22 21:39:39 - HelloAndroid] Uploading HelloAndroid.apk onto device 'emulator-5554'
[2010-12-22 21:39:39 - HelloAndroid] Installing HelloAndroid.apk...
[2010-12-22 21:40:26 - HelloAndroid] Success!
[2010-12-22 21:40:26 - HelloAndroid] Starting activity org.example.hello.Hello on device emulator-5554
[2010-12-22 21:40:29 - HelloAndroid] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=org.example.hello/.Hello }

and nothing happens... What should I do? Does Eclipse Classic needs some kind of configuration??

Anna

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You can configure the JRE that your program will run on by going to Window > Properties > Java < Installed JRE's. However, I don't think this will solve your problem as I think it's an issue with the Android SDK and not Eclipse. Here is a post describing the same problem and the solution provided is to:

Modify ddms.bat in C:\android-sdk-windows\tools folder. The last line from

call %java_exe% %java_debug% -Djava.ext.dirs=%javaextdirs% -Dcom.android.ddms.bindir= -jar %jarpath% %*

to:

call %java_exe% %java_debug% -Djava.ext.dirs=%javaextdirs% -Dcom.android.ddms.bindir= -jar %jarpath% ping emulator 0012