Java BufferedWriter close()用法及代码示例

Java中BufferedWriter类的close()方法用于从缓冲区流中清除字符，然后将其关闭。一旦关闭流，则进一步调用write()和append()之类的方法将引发异常。

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。

异常：如果发生I /O错误，则此方法将引发IOException。

以下示例程序旨在说明IO包中BufferedWriter类中的close()方法：

程序1:

// Java program to illustrate 
// BufferedWriter close() method 
  
import java.io.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
        try { 
  
            // Create the string Writer 
            StringWriter stringWriter 
                = new StringWriter(); 
  
            // Convert stringWriter to 
            // bufferedWriter 
            BufferedWriter buffWriter 
                = new BufferedWriter( 
                    stringWriter); 
  
            // Write "GEEKS" to buffered writer 
            buffWriter.write( 
                "GEEKSFORGEEKS", 0, 5); 
  
            // Close the buffered writer 
            buffWriter.close(); 
  
            System.out.println( 
                stringWriter.getBuffer()); 
        } 
        catch (Exception e) { 
            System.out.println( 
                "BufferedWriter is closed"); 
        } 
    } 
}

输出：

GEEKS

程序2:

// Java program to illustrate 
// BufferedWriter close() method 
  
import java.io.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
        try { 
  
            // Create the string Writer 
            StringWriter stringWriter 
                = new StringWriter(); 
  
            // Convert stringWriter to 
            // bufferedWriter 
            BufferedWriter buffWriter 
                = new BufferedWriter( 
                    stringWriter); 
  
            // Write "GEEKS" to buffered writer 
            buffWriter.write( 
                "GEEKSFORGEEKS", 0, 5); 
  
            // Close the buffered writer 
            buffWriter.close(); 
  
            System.out.println( 
                stringWriter.getBuffer()); 
  
            // It will throw exception 
            buffWriter.write( 
                "GEEKSFORGEEKS", 5, 8); 
        } 
        catch (Exception e) { 
            System.out.println( 
                "BufferedWriter is closed"); 
        } 
    } 
}

输出：

GEEKS
BufferedWriter is closed

参考： https://docs.oracle.com/javase/7/docs/api/java/io/BufferedWriter.html#close()

相关用法

注：本文由纯净天空筛选整理自pp_pankaj大神的英文原创作品 BufferedWriter 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。