Java快读快写模板

笔试压轴题会由于输入量较大的情况，输入输出所消耗的时间较多，导致超时，这时就需要快读快写。

import java.io.*;
import java.util.StringTokenizer;
// 注意类名必须为Main
class Main {
    public static void main(String[] args) {
        FastReader sc = new FastReader();
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        int a = sc.nextInt();
        int b = sc.nextInt();
        out.println(a + b);
        // 最后记得flush，不然会没有输出
        out.flush();
    }
}
// 下面是快读模板。需要使用时直接贴在下面就好了
class FastReader{
    StringTokenizer st;
    BufferedReader br;
    public FastReader(){
        br=new BufferedReader(new InputStreamReader(System.in));
    }

    String next(){
        while (st==null||!st.hasMoreElements()){
            try {
                st=new StringTokenizer(br.readLine());
            }catch (IOException e){
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }
    int nextInt() {
        return Integer.parseInt(next());
    }

    long nextLong() {
        return Long.parseLong(next());
    }
    double nextDouble() {
        return Double.parseDouble(next());
    }
    String nextLine() {
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    }

}