Java StringWriter

In this tutorial, we will learn about the Java StringWriter, its constructors and its methods with the help of an example.

The Java StringWriter class is a character stream that collects its output in a string buffer, which can then be used to construct a string.

Constructors of StringWriter

• StringWriter() :This creates a new string writer using the default initial string-buffer size.
• StringWriter(int initialSize) :This creates a new string writer using the specified initial string-buffer size.

Methods

Methods	Description
StringWriter append(char c)	Appends the specified character to this writer.
StringWriter append(CharSequence csq)	Appends the specified character sequence to this writer.
StringWriter append(CharSequence csq, int start, int end)	Appends a subsequence of the specified character sequence to this writer.
void close()	Closing a StringWriter has no effect.
void flush()	Flush the stream.
StringBuffer getBuffer()	Return the string buffer itself.
String toString()	Return the buffer's current value as a string.
void write(char[] cbuf, int off, int len)	Write a portion of an array of characters.
void write(int c)	Write a single character.
void write(String str)	Write a string.
void write(String str, int off, int len)	Write a portion of a string.

Examples :

import java.io.StringWriter;

public class Codemistic 
{
  	public static void main(String[] args) 
	{

    		String data = "This is the text in the string.";

    		try 
		{
      			// Create a StringWriter with default string buffer capacity
      			StringWriter output = new StringWriter();

      			// Writes data to the string buffer
      			output.write(data);

      			// Prints the string writer
      			System.out.println("Data in the StringWriter: " + output);

      			output.close();
    		}
    		catch(Exception e) 
		{
      			e.getStackTrace();
    		}
  	}
}

Output :

Data in the StringWriter: This file consists of a single line.

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