The standard class library’s java.lang and other packages provide many basic APIs that can benefit your Android apps. For example, you can perform mathematics operations and manipulate strings.
Note
We don’t list all classes and all methods and fields of the corresponding Java standard packages. You are free to investigate the official API documentation at https://docs.oracle.com/javase/8/docs/api. It is important to know that Android does not support all APIs, though. You will be given notice about ...
