Wednesday, 19 October 2016

Java Tutorial : Java IO (Java PushbackReader)


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https://www.youtube.com/watch?v=sJS-ZuphOaI&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java PushbackReader) 
Java Tutorial : Java IO (Java PushbackReader) 
Java Tutorial : Java IO (Java PushbackReader) 
myfile.txt
Hello world
PushbackReaderDemo.java
import java.io.FileReader;
import java.io.IOException;
import java.io.PushbackReader;

public class PushbackReaderDemo
{

    public static void main(String[] args) throws IOException
    {
        FileReader fileReader = null;
        PushbackReader pushbackReader = null;
        try
        {
            fileReader = new FileReader("myfile.txt");
            pushbackReader = new PushbackReader(fileReader);
            int data = pushbackReader.read();
            System.out.println((char) data);

            /*
             * Pushes back a single character by copying it
             * to the front of the pushback buffer. After
             * this method returns, the next character to be
             * read will have the value (char)c.
             */
            pushbackReader.unread(data);

            /*
             * Reads a single character.
             */
            data = pushbackReader.read();
            System.out.println((char) data);

        }
        finally
        {
            if (pushbackReader != null)
            {
                /*
                 * Closing a PushbackReader will also close
                 * the Reader instance from which the
                 * PushbackReader is reading.
                 */
                pushbackReader.close();
            }
        }

    }

}
Output
H
H
Refer:
https://docs.oracle.com/javase/8/docs/api/index.html?java/io/PushbackReader.html

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_PushbackReader_App.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_PushbackReader_App
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/afab0ff1466aae3a6d02c0935e804f2f099cf483/BasicJava/JavaIODemo_PushbackReader_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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