- Running tasks concurrently on multiple threads
- getResourceAsStream (ClassLoader)
- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
- getApplicationContext (Context)
- FileOutputStream (java.io)
An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
- InputStream (java.io)
A readable source of bytes.Most clients will use input streams that read data
from the file system (
- Charset (java.nio.charset)
A charset is a named mapping between Unicode characters and byte sequences.
Every Charset can decode
- Format (java.text)
The base class for all formats. This is an abstract base class which specifies
the protocol for clas
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
- Window (java.awt)
A Window object is a top-level window with no borders and no menubar. The
default layout for a windo
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