Java PushbackInputStream close()用法及代码示例

Java中的PushbackInputStream类的close()方法用于关闭输入流，并释放与该流关联的系统资源。调用此方法后，如果此类将引发IOException，则进一步调用其他方法。

用法:

public void close()
           throws IOException

指定者：该方法由close()方法AutoCloseable接口和close()方法Closeable接口指定。

覆盖：此方法覆盖FilterInputStream类的close()方法。

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包中的PushbackInputStream类的close()方法：

程序1:

// Java program to illustrate 
// PushbackInputStream close() method 
  
import java.io.*; 
  
public class GFG { 
    public static void main(String[] args) 
        throws IOException 
    { 
        try { 
  
            // Create an array 
            byte[] byteArray 
                = new byte[] { 'G', 'E', 'E', 
                               'K', 'S' }; 
  
            // Create inputStream 
            InputStream inputStr 
                = new ByteArrayInputStream(byteArray); 
  
            // Create object of 
            // PushbackInputStream 
            PushbackInputStream pushbackInputStr 
                = new PushbackInputStream(inputStr); 
  
            for (int i = 0; i < byteArray.length; i++) { 
                // Read the character 
                System.out.print( 
                    (char)pushbackInputStr.read()); 
            } 
  
            // Revoke close() 
            pushbackInputStr.close(); 
        } 
        catch (Exception e) { 
            System.out.println("Stream is closed"); 
        } 
    } 
}

输出：

GEEKS

程序2:

// Java program to illustrate 
// PushbackInputStream close() method 
  
import java.io.*; 
  
public class GFG { 
    public static void main(String[] args) 
        throws IOException 
    { 
        try { 
  
            // Create an array 
            byte[] byteArray 
                = new byte[] { 'G', 'E', 'E', 
                               'K', 'S' }; 
  
            // Create inputStream 
            InputStream inputStr 
                = new ByteArrayInputStream(byteArray); 
  
            // Create object of 
            // PushbackInputStream 
            PushbackInputStream pushbackInputStr 
                = new PushbackInputStream(inputStr); 
  
            // Revoke close() 
            pushbackInputStr.close(); 
  
            for (int i = 0; i < byteArray.length; i++) { 
                // Read the character 
                System.out.print( 
                    (char)pushbackInputStr.read()); 
            } 
        } 
        catch (Exception e) { 
            System.out.println("Stream is closed"); 
        } 
    } 
}

输出：

Stream is closed

参考文献：
https://docs.oracle.com/javase/10/docs/api/java/io/PushbackInputStream.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 PushbackInputStream 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。