randomwritetest.java

Java程序设计技巧与开发实例附书源代码。

import java.io.*;

public class RandomWriteTest
{
  public static void main(String args[])
  {
    try
    {
      FileOutputStream fs_out = new FileOutputStream("sample.dat");
      DataOutputStream out = new DataOutputStream(fs_out);
      for (int i = 0; i < (int) (Math.random() * 10000) + 10000; i++)
      {
        out.writeDouble(Math.random());
      }
      out.close();
    }
    catch (FileNotFoundException fe)
    {
      System.err.println(fe);
    }
    catch (IOException ioe)
    {
      System.out.println(ioe);
    }
  }
}