流的创建复制文件

public class liuDu01 {
    public static void main(String[] args) {
          //1.创建File类
        File file =new File("Howlle.txt");
        File file01 =new File("Howll.txt");
         //2.创建相关的流
        FileInputStream S1=null;
        FileOutputStream S2=null;
          try {
             S1=new FileInputStream(file);
             S2=new FileOutputStream(file01);
           //3.读的相关操作
             byte [] buffer=new byte[50];
             int le;
             while((le=S1.read(buffer))!=-1){
                 S2.write(buffer, 0, le);
             }
             
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
          //4.关闭流
            try {
                S1.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            try {
                S2.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
}
}