IO_FileReader&FileWriter

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        String pathWriter = "d:" + File.separator + "javatest" + File.separator + "1.txt";
        String pathReader = "d:" + File.separator + "javatest" + File.separator + "CollectionTest1.java";
        FileReader fr = new FileReader(new File(pathReader));
        FileWriter fw = new FileWriter(new File(pathWriter), true);
        char[] bufChar = new char[1024];
        int result = 0;
        while((result = fr.read(bufChar)) != -1) {
            fw.write(bufChar);
            System.out.println(new String(bufChar, 0, result));
        }
        
        fr.close();
        fw.close();
    }

}

IO_FileReader&FileWriter

原文：https://www.cnblogs.com/changzuidaerguai/p/9279887.html