Java PrintWriter close()方法及示例

Java中PrintWriter类的close()方法是用来关闭流的。关闭一个流，会删除其中的任何值或与之相关的任何资源。PrintWriter实例一旦关闭就不能工作了。此外，PrintWriter实例一旦关闭就不能再次关闭。

语法。

public void close()

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。它只是关闭了流。

下面的方法说明了close()方法的工作。

程序 1:

// Java program to demonstrate// PrintWriter close() 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 close the stream            // using close() method            writer.close();        }        catch (Exception e) {            System.out.println(e);        }    }}

输出:

GeeksForGeeks

程序2。

// Java program to demonstrate// PrintWriter close() 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 close the stream            // using close() method            writer.close();        }        catch (Exception e) {            System.out.println(e);        }    }}

输出:

A