- Reading from database using SQL prepared statement
- getExternalFilesDir (Context)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
- getResourceAsStream (ClassLoader)
- System (java.lang)
Provides access to system-related information and resources including standard
input and output. Ena
- KeyStore (java.security)
KeyStore is responsible for maintaining cryptographic keys and their owners.
The type of the syste
- Format (java.text)
The base class for all formats. This is an abstract base class which specifies
the protocol for clas
- Collections (java.util)
This class consists exclusively of static methods that operate on or return
collections. It contains
- ReentrantLock (java.util.concurrent.locks)
A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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