readbufferedtest.java

来自「Java课堂练习」· Java 代码 · 共 41 行

/**
 * @(#)ReadBufferedTest.java
 *
 *
 * @author 
 * @version 1.00 2007/11/16
 */
import java.io.*;

public class ReadBufferedTest {
        
    /**
     * Creates a new instance of <code>ReadBufferedTest</code>.
     */
    public ReadBufferedTest() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
      double sum=0;
      try {
      long start=System.currentTimeMillis();
      FileInputStream  fs_in=new FileInputStream("4.txt");
      BufferedInputStream bfs_in=new BufferedInputStream(fs_in);
      DataInputStream  in=new DataInputStream(bfs_in);
      for (int i=0; i<100000; i++) 
      	sum+=in.readDouble();
      in.close();
      long stop=System.currentTimeMillis();
      System.out.println("Averages:"+(sum/100000));
      System.out.println("Time passed:"+(stop-start));      
      }
      catch (IOException ioe) {
       System.out.println(ioe);
      }
    }
}