CharArrayWriter reset() method in Java with examples

The reset() method of the CharArrayWriter class in Java is used to reset the buffer so that it can be used again without throwing away the already allocated buffer.

Syntax:

public void reset()

Parameters: This method does not accept any parameter.



Return Value: This method does not returns anything.

Below program illustrate the above method:

Program 1:

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// Java program to illustrate
// the reset() method
  
import java.io.*;
  
public class GFG {
    public static void main(String[] args)
        throws IOException
    {
  
        // Initailizing the character array
        char[] geek = { 'G', 'E', 'E', 'K', 'S' };
  
        // Initailizing the CharArrayWriter
        CharArrayWriter char_array1
            = new CharArrayWriter();
  
        for (int c = 72; c < 77; c++) {
            // Use of write(int char)
            // Writer int value to the Writer
            char_array1.write(c);
        }
  
        // Use of size() method
        System.out.println("\nSize of char_array1 : "
                           + char_array1.size());
  
        // Resets the current stream
        char_array1.reset();
  
        // Use of size() method
        System.out.println("Size of char_array1 : "
                           + char_array1.size());
    }
}

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Output:

Size of char_array1 : 5
Size of char_array1 : 0

Program 2:

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// Java program to illustrate
// the reset() method
  
import java.io.*;
  
public class GFG {
    public static void main(String[] args)
        throws IOException
    {
  
        // Initailizing the character array
        char[] geek
            = { 'G', 'O', 'P', 'A', 'L', 'L' };
  
        // Initailizing the CharArrayWriter
        CharArrayWriter char_array1
            = new CharArrayWriter();
  
        for (int c = 72; c < 78; c++) {
            // Use of write(int char)
            // Writer int value to the Writer
            char_array1.write(c);
        }
  
        // Use of size() method
        System.out.println("\nSize of char_array1 : "
                           + char_array1.size());
  
        // Resets the current stream
        char_array1.reset();
  
        // Use of size() method
        System.out.println("Size of char_array1 : "
                           + char_array1.size());
    }
}

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Output:

Size of char_array1 : 6
Size of char_array1 : 0

Reference: https://docs.oracle.com/javase/10/docs/api/java/io/CharArrayWriter.html#reset()



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