Thursday, 28 July 2016

Java Tutorial : Java IO (FileWriter constructor accepts file object and boolean append)


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

FileWriterDemo.java
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

/*
 * public FileWriter(File file, boolean append) 
 *                             throws IOException
 * 
 * Parameters: 
 * ----------
 * 
 * file - a File object to write to
 * 
 * append - if true, then bytes will be written to the
 * end of the file rather than the beginning
 */
public class FileWriterDemo
{
    public static void main(String[] args) throws IOException
    {
        FileWriterDemo fileWriterDemo = new FileWriterDemo();
        fileWriterDemo.writeFile();
    }

    private void writeFile() throws IOException
    {
        FileWriter fileWriter = null;

        try
        {

            File file = new File("myfile.txt");

            /*
             * Constructs a FileWriter object given a File
             * object. If the second argument is true, then
             * bytes will be written to the end of the file
             * rather than the beginning.
             */
            fileWriter = new FileWriter(file, true);
            /*
             * Writes a string.
             */
            fileWriter.write("Welcome to America.\n");
            System.out.println("Successfully written to the file."
                    + "please check the file content.");
        }
        finally
        {
            if (fileWriter != null)
            {
                /*
                 * Closes the stream, flushing it first.
                 * Once the stream has been closed, further
                 * write() or flush() invocations will cause
                 * an IOException to be thrown. Closing a
                 * previously closed stream has no effect.
                 */
                fileWriter.close();
            }
        }
    }

}
Output
Successfully written to the file.please check the file content.
myfile.txt
Welcome to America.
Welcome to America.
Welcome to America.

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_FileWriter_cons_fileobj_append_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_FileWriter_cons_fileobj_append_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/a5a29c88719d4853b7ba8bae1b5fc9715fbc328c/BasicJava/JavaIODemo_FileWriter_cons_fileobj_append_App/?at=master

See also:

  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • All JAVA EE Links
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
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