프로그래밍/ACM

~java
       public String readLine() {
		StringBuffer buffer = new StringBuffer();
        int lg = 0, car = -1;

        try
        {
            while(true)
            {
                car = System.in.read();
                if ((car < 0) || (car == '\n')) break;
                buffer.append((char)car);
            }
        }
        catch (IOException e)
        {
            return (null);
        }

        if ((car < 0) && (lg == 0)) return (null);
        
        return buffer.toString().trim();
    }