File Input Output Java


            import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
class DOSDISDemo {
  public static void main(String[] args) throws Exception {
    DataOutputStream dos = null;
    FileOutputStream fos = new FileOutputStream("data.dat");
    dos = new DataOutputStream(fos);
    dos.writeInt(256);
    dos.writeDouble(Math.PI);
    dos.writeUTF("Java");
    DataInputStream dis = null;
    FileInputStream fis = new FileInputStream("data.dat");
    dis = new DataInputStream(fis);
    System.out.println(dis.readInt());
    System.out.println(dis.readDouble());
    System.out.println(dis.readUTF());
  }
}