Java PrintWriter flush()方法及示例

Java中PrintWriter类的flush()方法用于冲刷流。通过冲刷流，它意味着清除流中可能存在或不存在的任何元素。它既不接受任何参数，也不返回任何值。

语法。

public void flush()

参数。此方法不接受任何参数。

返回值。这个方法不返回任何值。它只是冲刷流。

下面的方法说明了flush()方法的工作。

程序 1:

// Java program to demonstrate// PrintWriter 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 PrintWriter instance            PrintWriter writer                = new PrintWriter(System.out);              // Write the above string to this writer            // This will put the string in the stream            // till it is printed on the console            writer.write(str);              // Now clear the stream            // using flush() method            writer.flush();        }        catch (Exception e) {            System.out.println(e);        }    }}

输出:

GeeksForGeeks

程序2。

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

输出:

A