Skip to Content

Read byte from file using DataInputStream

  1. /*
  2.   Read byte from file using DataInputStream
  3.   This Java example shows how to read a Java byte primitive value from file using
  4.   readByte method of Java DataInputStream class.
  5. */
  6.  
  7. import java.io.DataInputStream;
  8. import java.io.FileInputStream;
  9. import java.io.FileNotFoundException;
  10. import java.io.IOException;
  11.  
  12. public class ReadByteFromFile {
  13.  
  14.   public static void main(String[] args) {
  15.    
  16.     String strFilePath = "C://FileIO//readByte.txt";
  17.    
  18.     try
  19.     {
  20.       //create FileInputStream object
  21.       FileInputStream fin = new FileInputStream(strFilePath);
  22.      
  23.       /*
  24.        * To create DataInputStream object, use
  25.        * DataInputStream(InputStream in) constructor.
  26.        */
  27.      
  28.        DataInputStream din = new DataInputStream(fin);
  29.      
  30.        /*
  31.         * To read a Java byte primitive from file, use
  32.         * byte readByte() method of Java DataInputStream class.
  33.         */
  34.        
  35.         byte b = din.readByte();
  36.        
  37.         System.out.println("byte : " + b);
  38.        
  39.         /*
  40.          * To close DataInputStream, use
  41.          * void close() method.
  42.          */
  43.          din.close();
  44.        
  45.     }
  46.     catch(FileNotFoundException fe)
  47.     {
  48.       System.out.println("FileNotFoundException : " + fe);
  49.     }
  50.     catch(IOException ioe)
  51.     {
  52.       System.out.println("IOException : " + ioe);
  53.     }
  54.   }
  55. }