Java.io.ByteArrayOutputStream.size() Method

Description

The java.io.ByteArrayOutputStream.size() method returns the current size of the buffer accumulated inside the output stream.

Declaration

Following is the declaration for java.io.ByteArrayOutputStream.size() method:

public int size()

Parameters

• NA

Return Value

The method returns the current size of the buffer accumulated inside the output stream.

Exception

• NA

Example

The following example shows the usage of java.io.ByteArrayOutputStream.size() method.

package com.tutorialspoint;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class ByteArrayOutputStreamDemo {
   public static void main(String[] args) throws IOException {
      
      String str = "";
      int size = 0;      
      
      byte[] bs = {65, 66, 67, 68, 69};
      ByteArrayOutputStream baos = null;
      
      try{

         // create new ByteArrayOutputStream
         baos = new ByteArrayOutputStream();
      
         // for each byte in the buffer
         for (byte b : bs)
         {
            // write byte in to output stream
            baos.write(b);
            
            // convert output stream to string
            str = baos.toString();
            size = baos.size();
            
            // print
            System.out.print(size+":");
            System.out.println(str);
         }
      }catch(Exception e){

         // if I/O error occurs
         e.printStackTrace();
      }finally{
         if(baos!=null)
            baos.close();
      }   
   }
}

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

1:A
2:AB
3:ABC
4:ABCD
5:ABCDE