Click here to watch in Youtube :
https://www.youtube.com/watch?v=5kn8_SHVI9s&list=UUhwKlOVR041tngjerWxVccw
myfile.txt
PushbackInputStreamDemo.javahttps://www.youtube.com/watch?v=5kn8_SHVI9s&list=UUhwKlOVR041tngjerWxVccw
myfile.txt
Hello world
import java.io.FileInputStream; import java.io.IOException; import java.io.PushbackInputStream; /* * public PushbackInputStream(InputStream in, int size) * * Parameters: * ----------- * * in - the input stream from which bytes will be read. * size - the size of the pushback buffer. */ public class PushbackInputStreamDemo { public static void main(String[] args) throws IOException { FileInputStream fileInputStream = null; PushbackInputStream pushbackInputStream = null; try { fileInputStream = new FileInputStream("myfile.txt"); /* * Creates a PushbackInputStream with a pushback * buffer of the specified size, and saves its * argument, the input stream in, for later use. */ pushbackInputStream = new PushbackInputStream(fileInputStream, 8); byte[] byteArray = new byte[10]; /* * Reads up to len bytes of data from this input * stream into an array of bytes. */ int numberOfBytesRead = pushbackInputStream.read(byteArray, 0, 5); System.out.println("numberOfBytesRead = "+numberOfBytesRead); System.out.println(new String(byteArray)); /* * Pushes back a portion of an array of bytes by * copying it to the front of the pushback * buffer. */ pushbackInputStream.unread(byteArray, 0, 5); numberOfBytesRead = pushbackInputStream.read(byteArray, 0, 5); System.out.println("numberOfBytesRead = "+numberOfBytesRead); System.out.println(new String(byteArray)); } finally { if (pushbackInputStream != null) { /* * Closing a PushbackInputStream will also * close the Reader instance from which the * PushbackInputStream is reading. */ pushbackInputStream.close(); } } } }
numberOfBytesRead = 5 Hello numberOfBytesRead = 5 Hello
https://sites.google.com/site/ramj2eev1/home/javabasics/JavaIODemo_PushbackInputStream_Example_App.rar?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/JavaIODemo_PushbackInputStream_Example_App
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/1915a31f5d5a00376375704c121f0a5c57372292/BasicJava/JavaIODemo_PushbackInputStream_Example_App/?at=master
See also:
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