io流问题，关与文件操作的，我稍微改了下

Question

public static void demo_read() throws IOException{
FileInputStream fis=new FileInputStream("H://aa.txt");
BufferedInputStream bufis=new BufferedInputStream(fis);

    FileOutputStream fos=new FileOutputStream("J://copya.txt");
    BufferedOutputStream bufos=new BufferedOutputStream(fos);
    Character ch=0;
    while((ch=(char) bufis.read())!=-1){
        bufos.write(ch);

    }
    bufos.close();
    bufis.close();

}

Answer 1

为什么啊，文件为什么自动增长