confused.java

Java程序设计技巧与开发实例附书源代码。

import java.io.*;

public class Confused
{
  public static void writeIt()
  {
    try
    {
      DataOutputStream out = new DataOutputStream(
          new FileOutputStream("sample.dat"));
      out.writeInt(100);
      out.writeInt(200);
      out.close();
    }
    catch (IOException ioe)
    {
      System.out.println(ioe);
    }
  }

  public static void readIt()
  {
    try
    {
      DataInputStream in = new DataInputStream(new FileInputStream("sample.dat"));
      System.out.println(in.readDouble());
    }
    catch (IOException ioe)
    {
      System.out.println(ioe);
    }
  }

  public static void main(String args[])
  {
    writeIt();
    readIt();
  }
}