从控制台读取很长时间

//package com.nowjava;

import java.io.BufferedReader;/*from NowJava.com - 时  代  Java*/

import java.io.IOException;

import java.io.InputStreamReader;


public class Main {

    private static BufferedReader buffer = new BufferedReader(

            new InputStreamReader(System.in));


    /**

     * Reads a long from console

     * 

     * @return the read long

     * @throws IOException

     *             If an IO error occurs

     */

    public static long readLong()