Java PushbackReader class is a character stream reader. It is used to pushes back a character into stream and overrides the FilterReader class.
public class PushbackReader extends FilterReader
It is used to read a single character.
It is used to mark the present position in a stream.
It is used to tell whether the stream is ready to be read.
It is used to tell whether the stream supports mark() operation.
It is used to pushes back the character by copying it to the pushback buffer.
It is used to reset the stream.
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