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Write long to a file using DataOutputStream

  1. /*
  2.   Write long to a file using DataOutputStream
  3.   This Java example shows how to write a Java long primitive value to a file using
  4.   writeLong method of Java DataOutputStream class.
  5. */
  6.  
  7. import java.io.DataOutputStream;
  8. import java.io.FileOutputStream;
  9. import java.io.IOException;
  10.  
  11. public class WriteLongToFile {
  12.  
  13.   public static void main(String[] args) {
  14.    
  15.     String strFilePath = "C://FileIO//WriteLong.txt";
  16.    
  17.     try
  18.     {
  19.       //create FileOutputStream object
  20.       FileOutputStream fos = new FileOutputStream(strFilePath);
  21.      
  22.       /*
  23.        * To create DataOutputStream object from FileOutputStream use,
  24.        * DataOutputStream(OutputStream os) constructor.
  25.        *
  26.        */
  27.      
  28.        DataOutputStream dos = new DataOutputStream(fos);
  29.      
  30.        long l = 65;
  31.      
  32.        /*
  33.         * To write a long value to a file, use
  34.         * void writeLong(long l) method of Java DataOutputStream class.
  35.         *
  36.         * This method writes specified long to output stream as 8 bytes value.
  37.         */
  38.        
  39.         dos.writeLong(l);
  40.        
  41.         /*
  42.          * To close DataOutputStream use,
  43.          * void close() method.
  44.          *
  45.          */
  46.        
  47.          dos.close();
  48.        
  49.     }
  50.     catch (IOException e)
  51.     {
  52.       System.out.println("IOException : " + e);
  53.     }
  54.  
  55.   }
  56. }