Java输入外挂

最新推荐文章于 2023-01-10 17:37:10 发布

原创最新推荐文章于 2023-01-10 17:37:10 发布 · 1.5k 阅读

1 ·

CC 4.0 BY-SA版权

工具专栏收录该内容

1 篇文章

订阅专栏

经过测试，BufferedReader比Scanner快10倍还不止；StringTokenizer比split要快。
封装类Reader用于更快地读取常用类型。

package util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class Reader  
{  
    static BufferedReader reader;  
    static StringTokenizer tokenizer;  

    static void init(InputStream input)  
    {  
        reader = new BufferedReader(new InputStreamReader(input));  
        tokenizer = new StringTokenizer("");  
    }  

    static String next() throws IOException  
    {  
        while(!tokenizer.hasMoreTokens())  
        {  
            String str=reader.readLine();
            //System.out.println(str);
            tokenizer = new StringTokenizer(str);  
        }  
        return tokenizer.nextToken();  
    }  

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

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

    }  
}  
public class TestReader {
     public static void main(String[] args)  
        {  
            Reader.init(System.in);  
            int n=0;  
            double d =0;  
            try {  
                 n = Reader.nextInt();  
                 d = Reader.nextDouble();  

                 System.out.println(n);
                 System.out.println(d);

            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
}

lxm的提升输入效率代码