Simple running time checker

StopWatch.java

import android.util.Log;

public class StopWatch {
    private static String TAG = "StopWatch";

    private static long baseTime;
    private static long lastCheckTime;
    private static long nowTime;

    public static void start(String msg) {
        baseTime = System.currentTimeMillis();
        lastCheckTime = baseTime;
        nowTime = baseTime;
        log(msg);
    }

    public static void check(String msg) {
        lastCheckTime = nowTime;
        nowTime = System.currentTimeMillis();
        log(msg);
    }

    public static void end(String msg) {
        check(msg);
    }

    public static void reset() {
        baseTime = 0;
        lastCheckTime = 0;
        nowTime = 0;
    }

    public static void log(String msg) {
        Log.d(TAG, String.format("[%s] Total: %dms   Last Check Point From: %dms", msg, (nowTime - baseTime), (nowTime - lastCheckTime)));
    }
}