[java] staticなクラスのフィールドにキャッシュする

info.txt

a,い
b,ろ
c,は

StaticMemoryUtil.java

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * info.txtの中身
 *  a,い
 *  b,ろ
 *  c,は
 *
 * 使い方
 * String result = StaticMemoryUtil.resolve("a");
 * System.out.println(result); // い
 * 
 * @author honjo
 *
 */
public final class StaticMemoryUtil {

	private static final String PATH = "C:/develop/eclipse/pleiades-e3.5-java_20100226/workspace/javatest/info.txt";

	private static Map<String, String> map;

	static {
		init();
	}

	private StaticMemoryUtil() {

	}

	public static void init() {
		Map<String, String> localMap = new HashMap<String, String>();
		BufferedReader br = null;
		try {
			br = new BufferedReader(new FileReader(PATH));
			String line = null;
			while ((line = br.readLine()) != null) {
				String[] lineSplit = line.split(",");
				localMap.put(lineSplit[0], lineSplit[1]);
			}
			map = localMap;
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (br != null) {
				try {
					br.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}

	public static String resolve(String token) {
		return map.get(token);
	}
}