net.lulihu.dateTime.Timer Maven / Gradle / Ivy

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package net.lulihu.dateTime;

/**
 * 计时器
 * 计算某个过程花费的时间，精确到毫秒
 */
public class Timer {
    private long time;
    private boolean isNano;

    public Timer() {
        this(false);
    }

    public Timer(boolean isNano) {
        this.isNano = isNano;
        start();
    }

    /**
     * @return 开始计时并返回当前时间
     */
    public long start() {
        time = DateTimeKit.current(isNano);
        return time;
    }

    /**
     * @return 重新计时并返回从开始到当前的持续时间
     */
    public long durationRestart() {
        long now = DateTimeKit.current(isNano);
        long d = now - time;
        time = now;
        return d;
    }

    /**
     * @return 从开始到当前的持续时间
     */
    public long duration() {
        return DateTimeKit.current(isNano) - time;
    }
}