java – 将文件拆分为四个部分

try     {

        FileInputStream in=new FileInputStream(f);
        long i=f.length();
        long j=i/4;

        FileOutputStream f0=new FileOutputStream("File1.mp3");
        FileOutputStream f1=new FileOutputStream("File2.mp3");
        FileOutputStream f2=new FileOutputStream("File3.mp3");
        FileOutputStream f3=new FileOutputStream("File4.mp3");

        for(long k=0;k<j;k++){
            f0.write(in.read());
        }
        f0.close();
        for(long l=0;l<j;l++){
            f1.write(in.read());
        }
        f1.close();
        for(long m=0;m<j;m++){
            f2.write(in.read());  
        }
        f2.close();
        for(long n=0;n<j;n++){
            f3.write(in.read());
        }
        f3.close();

        in.close();
    }
    catch (IOException e)
    {

    }