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- getSystemService (Context)
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A ConnectException is thrown if a connection cannot be established to a remote
host on a specific po
- InetAddress (java.net)
An Internet Protocol (IP) address. This can be either an IPv4 address or an IPv6
address, and in pra
- Scanner (java.util)
A parser that parses a text string of primitive types and strings with the help
of regular expressio
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- Base64 (org.apache.commons.codec.binary)
Provides Base64 encoding and decoding as defined by RFC 2045.This class
implements section 6.8. Base
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
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