Java.io.FilterWriter.available() Method

Description

The java.io.FilterWriter.available() method returns an the number of bytes that can be read from this input stream without blocking by the next invocation of a method from this input stream.

Declaration

Following is the declaration for java.io.FilterWriter.available() method:

public int available()

Parameters

• NA

Return Value

The method returns the number of bytes that can be read.

Exception

• IOException -- If an I/O error occurs.

Example

The following example shows the usage of java.io.FilterWriter.available() method.

package com.tutorialspoint;

import java.io.FileInputStream;
import java.io.InputStream;

public class InputStreamDemo {
   public static void main(String[] args) throws Exception {
      InputStream is = null;
      int i=0;
      char c;
      
      try{
         // new input stream created
         is = new FileInputStream("C://test.txt");
         
         // read till the end of the stream
         while((i=is.read())!=-1)
         {
            // convert integer to character
            c = (char)i;
            
            // print
            System.out.println("Character Read: "+c);
         }
      }catch(Exception e){
         
         // if any I/O error occurs
         e.printStackTrace();
      }finally{
         
         // releases system resources associated with this stream
         if(is!=null)
            is.close();
      }
   }
}

Assuming we have a text file c:/test.txt, which has the following content. This file will be used as an input for our example program:

ABCDEF

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

Character Read: A
Character Read: B
Character Read: C
Character Read: D
Character Read: E
Character Read: F