Java FilterWriter

Java FilterWriter class is an abstract class which is used to write filtered character streams.

The sub class of the FilterWriter should override some of its methods and it may provide additional methods and fields also.


Modifier Type Field Description
protected Writer out The underlying character-output stream.


Modifier Constructor Description
protected FilterWriter(Writer out) It creates InputStream class Object


Modifier and Type Method Description
void close() It closes the stream, flushing it first.
void flush() It flushes the stream.
void write(char[] cbuf, int off, int len) It writes a portion of an array of characters.
void write(int c) It writes a single character.
void write(String str, int off, int len) It writes a portion of a string.

FilterWriter Example


i love my country

While running the current program if the current working directory does not contain the file, a new file is created and CustomFileWriter will write the text "I LOVE MY COUNTRY" in lowercase to the file.

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