package javaapplication1;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class JavaApplication1 {
public static void main(String[] args) throws IOException {
String sFilePath = "d://data.txt";
try {
DataOutputStream dos;
try (FileOutputStream fos = new FileOutputStream(sFilePath)) {
dos = new DataOutputStream(fos);
dos.writeDouble(3.1415);
dos.flush();
}
DataInputStream dis;
try (InputStream is = new FileInputStream(sFilePath)) {
dis = new DataInputStream(is);
double d = dis.readDouble();
System.out.print(d);
}
} catch (IOException ioe) {
System.out.println(ioe.getMessage());
}
}
}
/*
run:
3.1415
*/
