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

JAVA.IO.FILEINPUTSTREAM.GETCHANNEL METHOD
http://www.tutorialspoint.com/java/io/fileinputstream_getchannel.htm
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Description
The java.io.FileInputStream.getChannel returns the unique FileChannel object associated with
this file input stream. The position of the returned channel the number of bytes read from the file
so far.
Declaration
Following is the declaration for java.io.FileInputStream.getChannel method:
public FileChannel getChannel()
Parameters
NA
Return Value
The methods returns the channel ssociated with this file input stream.
Exception
NA
Example
The following example shows the usage of java.io.FileInputStream.getChannel method.
package com.tutorialspoint;
import java.io.IOException;
import java.io.FileInputStream;
import java.nio.channels.FileChannel;
public class FileInputStreamDemo {
public static void main(String[] args) throws IOException {
FileChannel fc = null;
FileInputStream fis = null;
int i=0;
long pos;
char c;
try{
// create new file input stream
fis = new FileInputStream("C://test.txt");
// read till the end of the file
while((i=fis.read())!=-1)
{
// get file channel
fc = fis.getChannel();
// get channel position
pos = fc.position();
// integer to character
c = (char)i;
// prints
System.out.print("No of bytes read: "+pos);
System.out.println("; Char read: "+c);
}
}catch(Exception ex){
// if an I/O error occurs
System.out.println("IOException: close called before read()");
}finally{
// releases all system resources from the streams
if(fis!=null)
fis.close();
if(fc!=null)
fc.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:
No
No
No
No
No
No
of
of
of
of
of
of
bytes
bytes
bytes
bytes
bytes
bytes
read:
read:
read:
read:
read:
read:
1;
2;
3;
4;
5;
6;
Char
Char
Char
Char
Char
Char
read:
read:
read:
read:
read:
read:
A
B
C
D
E
F
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