Java Writer flush()方法及示例

Java中Writer类的flush()方法是用来冲刷写程序的。通过冲刷写入器，它意味着清除写入器中的任何元素，这些元素可能在或不在写入器中。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。它只是刷新了写入器。

下面的方法说明了flush()方法的工作。

程序 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);        }    }}

输出:

GeeksForGeeks

程序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);        }    }}

输出:

A