FilterWriter 

Introduction

The Java.io.FilterWriter class is for writing filtered character streams. Following are the important points about FilterWriter −

• The class itself provides default methods that pass all requests to the contained stream.
• The Subclasses of FilterWriter should override some of these methods and may also provide additional methods and fields.

Class declaration

Following is the declaration for Java.io.FilterWriter class −

public abstract class FilterWriter
   extends Writer

Learn Java in-depth with real-world projects through our Java certification course. Enroll and become a certified expert to boost your career.

Field

Following are the fields for Java.io.FilterWriter class −

• protected Writer in − This is the character-output stream.
• protected Object lock − This is the object used to synchronize operations on this stream.

Class constructors

Sr.No.	Constructor & Description
1	protected FilterWriter(Writer in)This creates a new filtered writer.

Class methods

Sr.No.	Method & Description
1	void close()This method flushes the stream.
2	void flush()This method flushes the stream.
3	void write(char[] cbuf, int off, int len)This method writes a portion of an array of characters.
4	void write(int c)This method writes a single character.
5	void write(String str, int off, int len)This method writes a portion of a string.

Methods inherited

This class inherits methods from the following classes −

• Java.io.Writer
• Java.io.Object