Java PushbackInputStream close()用法及代碼示例

Java中的PushbackInputStream類的close()方法用於關閉輸入流，並釋放與該流關聯的係統資源。調用此方法後，如果此類將引發IOException，則進一步調用其他方法。

用法:

public void close()
           throws IOException

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

覆蓋：此方法覆蓋FilterInputStream類的close()方法。

參數：此方法不接受任何參數。

返回值：此方法不返回任何值。

異常：如果發生I /O錯誤，則此方法將引發IOException。

以下示例程序旨在說明IO包中的PushbackInputStream類的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"); 
        } 
    } 
}

輸出：

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"); 
        } 
    } 
}

輸出：

Stream is closed

參考文獻：
https://docs.oracle.com/javase/10/docs/api/java/io/PushbackInputStream.html#close()

相關用法

注：本文由純淨天空篩選整理自pp_pankaj大神的英文原創作品 PushbackInputStream close() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。