Java.io.FilterOutputStream.write() Method


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Description

The java.io.FilterOutputStream.write(byte[] b, int off, int len) method writes len bytes from the specified byte array starting at offset off to this output stream.

Declaration

Following is the declaration for java.io.FilterOutputStream.write(byte[] b, int off, int len) method −

public void write(byte[] b, int off, int len)

Parameters

  • b − source buffer to be written to the stream

  • off − The start offset in the data

  • len − The number of bytes to write

Return Value

This method does not return any value.

Exception

IOException − If an I/O error occurs.

Example

The following example shows the usage of java.io.FilterOutputStream.write(byte[] b, int off, int len) method.

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, 2, 3);
                  
         // 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();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Character read: C
Character read: D
Character read: E

java_io_filteroutputstream.htm

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