Read long from file using DataInputStream
- /*
- Read long from file using DataInputStream
- This Java example shows how to read a Java long primitive value from file using
- readLong method of Java DataInputStream class.
- */
- import java.io.DataInputStream;
- import java.io.FileInputStream;
- import java.io.FileNotFoundException;
- import java.io.IOException;
- public class ReadLongFromFile {
- public static void main(String[] args) {
- String strFilePath = "C://FileIO//readLong.txt";
- try
- {
- //create FileInputStream object
- FileInputStream fin = new FileInputStream(strFilePath);
- /*
- * To create DataInputStream object, use
- * DataInputStream(InputStream in) constructor.
- */
- DataInputStream din = new DataInputStream(fin);
- /*
- * To read a Java long primitive from file, use
- * byte readLong() method of Java DataInputStream class.
- *
- * This method reads 8 bytes and returns it as a long value.
- */
- long l = din.readLong();
- System.out.println("long : " + l);
- /*
- * To close DataInputStream, use
- * void close() method.
- */
- din.close();
- }
- catch(FileNotFoundException fe)
- {
- System.out.println("FileNotFoundException : " + fe);
- }
- catch(IOException ioe)
- {
- System.out.println("IOException : " + ioe);
- }
- }
- }
