java - 创建 2 个计时器

Question

我有 MyTimer 需要参数：

public MyTimer(long mac, String ipAddress){
    this.macAddress = mac;
    this.ip = ipAddress;

    timer = new Timer();

    TimerTask timerTask = new TimerTask() {

        @Override
        public void run() {
            log.info("mac " + String.valueOf(macAddress) + " ip " + ip);

        }
    };

    timer.schedule(timerTask, 30*1000,30*1000);
    log.info("timer created, mac:" String.valueOf(macAddress) + " ip " + ip);
}

从另一个班级：

MyTimer timer1 = new MyTimer(mac1, ip1);
MyTimer timer2 = new MyTimer(mac2, ip2);

创建后一切正常：

Oct 23, 2012 1:36:43 PM spb.MyTimer <init>
INFO: timer created, mac: 26954208388119 ip 77.209.184.53
Oct 23, 2012 1:36:43 PM spb.MyTimer <init>
INFO: timer created, mac 26954208388118 ip 178.139.7.27

但是，当计时器达到延迟时：

Oct 23, 2012 1:39:13 PM spb.MyTimer$1 run
INFO: mac 26954208388119 ip 178.139.7.27
Oct 23, 2012 1:39:13 PM spb.MyTimer$1 run
INFO: mac 26954208388118 ip 178.139.7.27

这个问题应该如何解决？