Where is the standard Java exceptions in Android platform?

I'm wondering there i开发者_运维百科s the standard Java exceptions like NullPointerException, InvalidArgumentException, etc... I can't find them accessible under Android platform.

Why the Android implemented this way? And if I'm developing some shared Android library, am I need to write my own exceptions?

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This link says that NullPointerException (and many others) are available in even early versions of the API. Where are you looking for them that you aren't finding them?

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Something must be broken in your setup.

The Android SDK contains the standard java exceptions in the usual place, in the java.lang package.

For example (Android 1.5): /platforms/android-3/android.jar

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java.lang.NullPointerException is part of the android API - the dalvik vm is based on inspired by apache harmony which is an open source implementation of Java.