JAVA EE: Java Tutorial : Java IO (FileInputStream constructor accept file object)

Tuesday, 12 July 2016

Java Tutorial : Java IO (FileInputStream constructor accept file object)

Click here to watch in Youtube :
https://www.youtube.com/watch?v=tP8gYF9FWKY&list=UUhwKlOVR041tngjerWxVccw

myfile.txt

Peter is coming to India.

FileInputStreamDemo.java

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

/*
 * public FileInputStream(File file) throws
 *                          FileNotFoundException
 * 
 * Parameters: 
 * ----------
 * 
 * file - the file to be opened for reading.
 */

public class FileInputStreamDemo
{

    public static void main(String[] args) throws IOException
    {
        FileInputStreamDemo fileInputStreamDemo = new FileInputStreamDemo();
        fileInputStreamDemo.readFile();
    }

    private void readFile() throws IOException
    {
        FileInputStream fileInputStream = null;

        try
        {
            File file = new File("myfile.txt");
            /*
             * Creates a FileInputStream by opening a
             * connection to an actual file, the file named
             * by the File object file in the file system.
             */
            fileInputStream = new FileInputStream(file);
            int i;

            /*
             * Reads a byte of data from this input stream.
             */
            while ((i = fileInputStream.read()) != -1)
            {
                System.out.print((char) i);
            }
        }
        finally
        {
            if (fileInputStream != null)
            {
                /*
                 * Closes this file input stream and
                 * releases any system resources associated
                 * with the stream.
                 */
                fileInputStream.close();
            }
        }
    }

}