?? buffered.java
字號:
//c19:Buffered.java
//author:ZhangHongbin
//This program is protected by copyright laws.
//Compare Buffered and Unbuffered files.
import java.io.*;
import java.util.*;
public class Buffered
{
public static void main(String[] args)throws Exception
{
FileWriter unbuff1 =new FileWriter("unbuff1.txt");
BufferedWriter buff2 =new BufferedWriter(
new FileWriter("buff2.txt"));
BufferedWriter buff3 =new BufferedWriter(new BufferedWriter(
new BufferedWriter(new BufferedWriter(new BufferedWriter(
new FileWriter("buff3.txt"))))));
System.out.println("write unbuffered file1 "+
timeCosted(unbuff1)+"ms");
System.out.println("write buffered file2 "+
timeCosted(buff2)+"ms");
System.out.println("write buffered file3 "+
timeCosted(buff3)+"ms");
}
static long timeCosted(Writer out) throws Exception
{
System.out.println();
Date startDate=new Date();
for (int i=0;i<10000;i++)
{
out.write("O");
}
out.close();
Date endDate=new Date();
long timeLasted=endDate.getTime()-startDate.getTime();
return timeLasted;
}
}
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