Download Java.io.FileInputStream.available() Method Example

JAVA.IO.FILEINPUTSTREAM.AVAILABLE METHOD
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Description
The java.io.FileInputStream.available method returns number of remaining bytes that can be
read from this input stream without blocking by the next method call for this input stream. The
next method call can also be the another thread.
Declaration
Following is the declaration for java.io.FileInputStream.available method:
public int available()
Parameters
NA
Return Value
The methods returns and estimated of the number of remaining bytes that can be read from this
input stream without blocking.
Exception
IOException -- If the file input stream has been closed by calling close or any I/O error
occurs.
Example
The following example shows the usage of java.io.FileInputStream.available method.
package com.tutorialspoint;
import java.io.IOException;
import java.io.FileInputStream;
public class FileInputStreamDemo {
public static void main(String[] args) throws IOException {
FileInputStream fis = null;
int available = 0;
int i=0;
try{
// create new file input stream
fis = new FileInputStream("C://test.txt");
// read till the end of the stream
while((i=fis.read())!=-1)
{
// available bytes
available = fis.available();
// convert integer to character
char c = (char)i;
// prints
System.out.print("Available: "+available);
System.out.println("; Read: "+c);
}
}catch(Exception ex){
// if an I/O error occurs
ex.printStackTrace();
}finally{
// releases all system resources from the streams
if(fis!=null)
{
fis.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:
Available:
Available:
Available:
Available:
Available:
Available:
5;
4;
3;
2;
1;
0;
Read:
Read:
Read:
Read:
Read:
Read:
A
B
C
D
E
F
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