- Running tasks concurrently on multiple threads
- setContentView (Activity)
- startActivity (Activity)
- getSystemService (Context)
- System (java.lang)
Provides access to system-related information and resources including standard
input and output. Ena
- ConnectException (java.net)
A ConnectException is thrown if a connection cannot be established to a remote
host on a specific po
- MalformedURLException (java.net)
This exception is thrown when a program attempts to create an URL from an
incorrect specification.
- KeyStore (java.security)
KeyStore is responsible for maintaining cryptographic keys and their owners.
The type of the syste
- HashSet (java.util)
HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
- GridLayout (java.awt)
The GridLayout class is a layout manager that lays out a container's components
in a rectangular gri
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