车辆CAN测试小代码

package test;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Scanner;



public class FindName {

	public static void main(String[] args) throws FileNotFoundException {
		ArrayList list = new ArrayList();
		System.out.println("开始查看");
		Scanner sc = new Scanner(new File("C://Path/To/File"));
		while (sc.hasNextLine()) {
			String str = sc.nextLine();
			Pattern pattern = Pattern.compile("(?<=can[1-9] ).*?(?=#)");
			Matcher matcher = pattern.matcher(str);
			if (matcher.find())
				;
			String s = matcher.group();
			list.add(s);
		}
		Map map = count(list);
		System.out.println(map);
		sc.close();
	}

	public static Map count(ArrayList list) {
		Map map = new HashMap();
		for (String s : list) {
			if (map.containsKey(s)) {
				Integer old = map.get(s);
				map.put(s, old + 1);
			} else {
				map.put(s, 1);
			}
		}
		return map;
	}

}