Java PrintWriter close()用法及代码示例

Java中的PrintWriter类的close()方法用于关闭流。关闭流会释放其中的任何值或与之关联的任何资源。关闭后的PrintWriter实例将无法使用。同样，一旦关闭，PrintWriter实例也无法再次关闭。

用法:

public void close()

参数：此方法不接受任何参数。

返回值：此方法不返回任何值。它只是关闭流。

下面的方法说明了close()方法的用法方式：

示例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

示例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：

相关用法

注：本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 PrintWriter close() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。