- Running tasks concurrently on multiple threads
- getSystemService (Context)
- scheduleAtFixedRate (Timer)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A charset is a named mapping between Unicode characters and byte sequences.
Every Charset can decode
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Uses a one-way hash function to turn an arbitrary number of bytes into a
fixed-length byte sequence.
- Arrays (java.util)
This class contains various methods for manipulating arrays (such as sorting and
searching). This cl
- TimeZone (java.util)
TimeZone represents a time zone offset, and also figures out daylight savings.
Typically, you get a
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
- GridBagLayout (java.awt)
The GridBagLayout class is a flexible layout manager that aligns components
vertically and horizonta
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