StringWriter flush() method in Java with Examples

The flush() method of StringWriter Class in Java is used to flush the writer. By flushing the writer, it means to clear the writer of any element that may be or maybe not inside the writer. It neither accepts any parameter nor returns any value.

Syntax:

public void flush()

Parameters: This method does not accepts any parameter.

Return Value: This method does not returns any value. It just flushes the writer.

Below programs illustrates the working of flush() method:

Program 1:

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// Java program to demonstrate
// StringWriter flush() method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
        // The string to be written in the writer
        String str = "GeeksForGeeks";
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // Write the above string to this writer
            // This will put the string in the writer
            // till it is printed on the console
            writer.write(str);
  
            System.out.println(writer.toString());
  
            // Now clear the writer
            // using flush() method
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

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Output:

GeeksForGeeks

Program 2:

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// Java program to demonstrate
// StringWriter flush() method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // Write the char to this writer
            // This will put the char in the writer
            // till it is printed on the console
            writer.write(65);
  
            System.out.println(writer.toString());
  
            // Now clear the writer
            // using flush() method
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

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Output:

A


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