Java Java.io.FilterOutputStream.write()用法及代碼示例

描述

這個java.io.FilterOutputStream.write(byte[] b)方法將 b.length 字節寫入此輸出流。

聲明

以下是聲明java.io.FilterOutputStream.write(byte[] b)方法 -

public void write(byte[] b)

參數

b- 要寫入流的源緩衝區

返回值

此方法不返回任何值。

異常

IOException− 如果發生 I/O 錯誤。

示例

下麵的例子展示了 java.io.FilterOutputStream.write(byte[] b) 方法的用法。

package com.tutorialspoint;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class FilterOutputStreamDemo {
   public static void main(String[] args) throws Exception {
      OutputStream os = null; 
      FilterOutputStream fos = null;
      FileInputStream fis = null;
      byte[] buffer = {65, 66, 67, 68, 69};
      int i = 0;
      char c;
      
      try {
         // create output streams
         os = new FileOutputStream("C://test.txt");
         fos = new FilterOutputStream(os);

         // writes buffer to the output stream
         fos.write(buffer);
                  
         // forces byte contents to written out to the stream
         fos.flush();
         
         // create input streams
         fis = new FileInputStream("C://test.txt");
         
         while((i = fis.read())!=-1) {
         
            // converts integer to the character
            c = (char)i;
            
            // prints
            System.out.println("Character read:"+c);
         }
         
      } catch(IOException e) {
         // if any I/O error occurs
         System.out.print("Close() is invoked prior to write()");
      } finally {
         // releases any system resources associated with the stream
         if(os!=null)
            os.close();
         if(fos!=null)
            fos.close();
      }
   }
}

讓我們編譯並運行上麵的程序，這將產生以下結果 -

Character read:A
Character read:B
Character read:C
Character read:D
Character read:E