A small input chain between FileInputStream and DataInputStream : Stream « File « SCJP

1. SCJP
2. File
3. Stream

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;

public class MainClass {
  public static void main(String[] argv) {
    try {
      // Construct the chain
      FileInputStream fis = new FileInputStream("fname");
      DataInputStream dis = new DataInputStream(fis);

      // Read
      double d = dis.readDouble();
      int i = dis.readInt();
      String s = dis.readUTF();

      // Close the chain
      dis.close(); // Close dis first, because it
      fis.close(); // was created last
    } catch (IOException e) {
    }

  }
}