The flush() method of Writer 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 do not accepts any parameter.
Return Value: This method do not returns any value. It just flushes the writer.
Below methods illustrates the working of flush() method:
Program 1:
// Java program to demonstrate// Writer 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 Writer instance            Writer writer                = new PrintWriter(System.out);              // 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);              // Now clear the writer            // using flush() method            writer.flush();        }        catch (Exception e) {            System.out.println(e);        }    }} |
Output:
GeeksForGeeks
Program 2:
// Java program to demonstrate// Writer flush() method  import java.io.*;  class GFG {    public static void main(String[] args)    {          try {              // Create a Writer instance            Writer writer                = new PrintWriter(System.out);              // Write the char to this writer            // This will put the char in the writer            // till it is printed on the console            writer.write(65);              // Now clear the writer            // using flush() method            writer.flush();        }        catch (Exception e) {            System.out.println(e);        }    }} |
Output:
A
