CharArrayWriter flush() method in Java with examples

The flush() method of the CharArrayWriter class in Java is used to flush the stream. 
Syntax: 

public void flush()

Parameters: This method does not accept any parameter.
Return Value: This method does not returns anything. 
Below program illustrate the above method: 
Program 1:

Java

// Java program to illustrate
// the flush() method

import java.io.*;

public class GFG {
    public static void main(String[] args)
        throws IOException
    {

        // Initializing the character array
        char[] geek = { 'G', 'E', 'E', 'K', 'S' };

        // Initializing 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());

        // Flushes the current stream
        char_array1.flush();
    }
}

Output:

Size of char_array1 : 5

Program 2:

Java

// Java program to illustrate
// the flush() method

import java.io.*;

public class GFG {
    public static void main(String[] args)
        throws IOException
    {

        // Initializing the character array
        char[] geek
            = { 'G', 'O', 'P', 'A', 'L', 'L' };

        // Initializing 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());

        // Flushes the current stream
        char_array1.flush();
    }
}

Output:

Size of char_array1 : 6

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