package cn.niit.demo10;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/*
位元組流複製檔案
位元組陣列 緩衝 */
public class Copy {
    //位元組流複製檔案
public static void main(String[] args){
        long s=System.currentTimeMillis();
FileInputStream fis=null;
FileOutputStream fos=null;
 
        try {
            fis=new FileInputStream("c:\\a.rar");
fos=new FileOutputStream("d:\\a.rar");
//定義位元組陣列,緩衝
byte[] bytes=new byte[1024];
//讀取陣列,寫入陣列
int len=0;
            while ((len=fis.read(bytes))!=-1){
                fos.write(bytes,0,len);
}
        }catch (IOException e){
            System.out
 
.println(e);
            throw new RuntimeException("檔案複製失敗!");
}finally {
            try {
                if (fos!=null) {
                    fos.close();
}
            }catch (IOException e){
                throw new RuntimeException("釋放資源失敗");
}finally{
                try {
                    if 
 
(fis!=null)
                        fis.close();
}catch (IOException e){
                    throw new RuntimeException("釋放資源失敗");
}
            }
        }
        long e=System.currentTimeMillis();
System.out.println(e-s);
}
}