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Obsolete fields, methods, and classes should not be used. Java lacks any annotation that indicates obsolescence; nevertheless, several classes and methods are documented as obsolete. For instance, the java.util.Dictionary<K,V> class is marked as obsolete; new code should use java.util.Map<K,V> instead [API 2006].

Obsolete Methods and Classes

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The Android SDK also has deprecated or obsolete APIs. Also, there may exist incompatible APIs depending on the SDK version. Therefore, it is recommended that developers refer to the "Android API Difference report" and consider replacing the deprecated APIs.

Bibliography

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