/*
Read double from file using DataInputStream
This Java example shows how to read a Java double primitive value from file using
readDouble method of Java DataInputStream class.
*/
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
public class ReadDoubleFromFile {
public static void main(String[] args) {
String strFilePath = "C://FileIO//readDouble.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 double primitive from file, use
* byte readDouble() method of Java DataInputStream class.
*
* This method reads 8 bytes and returns it as a double value.
*/
double d = din.readDouble();
System.out.println("Double : " + d);
/*
* 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);
}
}
}
