d盘文件复制到e盘（并计时）

package chap10.sec03;


import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;


public class Demo6 {

public static void stream() throws Exception{
InputStream in=new FileInputStream("d:/《一脚踹进J2SE》视频笔录.pdf");
OutputStream out=new FileOutputStream("e:/复制的文件.pdf");
int b=0;
long startTime=System.currentTimeMillis();
while((b=in.read())!=-1){
out.write(b);
}
in.close();
out.close();
long endTime=System.currentTimeMillis();
System.out.println("复制文件所用时间为："+(endTime-startTime));
}
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
stream();
}


}