java 大数据量输入下的快速io

StreamTokenizer

static StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));

static int nextInt() {
    return Integer.parseInt(in.nextToken());
}

StringTokenizer

static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
static StringTokenizer tokenizer = null;

static String next(){
    while (tokenizer == null || !tokenizer.hasMoreTokens()){
        try{
            tokenizer = new StringTokenizer(reader.readLine());
        } catch (IOException e){
            throw new RuntimeException(e);
        }
    }
    return tokenizer.nextToken();
}

static int nextInt(){
    return Integer.parseInt(next());
}