第四周作业

‘package pro;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class fuzhi {
long a=System.currentTimeMillis();
public void fz(){
try {
FileInputStream fs =new FileInputStream("a.mp3");
FileOutputStream fos =new FileOutputStream("f.mp3");
int read=fs.read();
byte[] buf = new byte[1024*1000];
int len = 0 ;
while((len=fs.read(buf)) != -1){
fos.write(buf,0,len);
}

        fs.close();
        fos.close();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }System.out.println("执行耗时 : "+(System.currentTimeMillis()-a)/1000f+" 秒 ");

}
public static void main(String []args){
fuzhi a= new fuzhi();
a.fz();
}
}

’