刷oj之类的题时java Scanner读取太慢解决之道

1.转载自一个

https://www.cpe.ku.ac.th/~jim/java-io.html

2.工具代码

class Reader {
    static BufferedReader reader;
    static StringTokenizer tokenizer;

    /** call thReader method to initialize reader for InputStream */
    static void init(InputStream input) {
        reader = new BufferedReader(
                     new InputStreamReader(input) );
        tokenizer = new StringTokenizer("");
    }

    /** get next word */
    static String next() throws IOException {
        while ( ! tokenizer.hasMoreTokens() ) {
            //TODO add check for eof if necessary
            tokenizer = new StringTokenizer(
                   reader.readLine() );
        }
        return tokenizer.nextToken();
    }

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

    static double nextDouble() throws IOException {
        return Double.parseDouble( next() );
    }
}

3.比如蓝桥杯——安慰奶牛问题，从60分变成了100分。