自己免费网站建设,有家装饰有限公司地址,wordpress 名片主题,个人网站设计与制作源代码定时器的用法是java核心基础之一#xff0c;很多特殊功能都需要用到定时器#xff0c;下面一起来看看定时器是如何编写的吧。示例#xff1a;一个具备周期性定时(毫秒级);单时刻定时(秒级);多时刻定时(秒级)。后两个时间的设置必须符合“yyyy-MM-ddHH:mm:ss”、“yyyy-MM-dd…定时器的用法是java核心基础之一很多特殊功能都需要用到定时器下面一起来看看定时器是如何编写的吧。示例一个具备周期性定时(毫秒级);单时刻定时(秒级);多时刻定时(秒级)。后两个时间的设置必须符合“yyyy-MM-ddHH:mm:ss”、“yyyy-MM-dd ”、“HH:mm:ss”、“HH:mm”、“yyyy-MM-dd HH”、“yyyy-MM-ddHH:mm”格式的定时器Java代码//TimerTask代码import java.text.SimpleDateFormat;import java.util.Date;import java.util.List;public abstract class TimerTask implements Runnable{private long period -1;private String time;private List timeList;private boolean isCancel false;private boolean isFormart false;public long getPeriod(){return period;}public void setPeriod(long period){this.period period;}public void setTime(String time){this.time time;}public String getTime(){return time;}public List getTimeList(){return timeList;}public void setTimeList(List timeList){this.timeList timeList;}public void cancel(){this.isCancel true;}public boolean isCancel(){return isCancel;}public abstract void execute();public void run(){//格式化传入的日期或日期时间或时间参数if (!this.isFormart){this.fomart();}//确保指定的运行点在一秒钟内只运行一次boolean isRun false;//确保多个运行点中每个运行点在一秒钟内只运行一次int flag[] null;try{flag new int[this.timeList.size()];}catch (Exception e){}SimpleDateFormat sdf new SimpleDateFormat(yyyy-MM-dd HH:mm:ss);//当没有被取消时while (!isCancel){String dt sdf.format(new Date());if (this.period 0){try{Thread.sleep(this.period);}catch (Exception e){}this.execute();}else if (this.time ! null){if (this.time.indexOf(-) 0){if (this.time.equals(dt) !isRun){isRun true;this.execute();}}else{if (this.time.equals(dt.substring(11)) !isRun){isRun true;this.execute();}}}else if (this.timeList ! null){int loopIndex 0;for (String dateTime: this.timeList){if (dateTime.indexOf(-) 0){if (dateTime.equals(dt) flag[loopIndex] 0){this.execute();flag[loopIndex] 1;}}else{if (dateTime.equals(dt.substring(11)) flag[loopIndex] 0){this.execute();flag[loopIndex] 1;}}loopIndex;}}}}private void fomart(){if (!this.isFormart){if (this.time ! null){this.time this.format(this.time);}if (this.timeList ! null){for (int i 0; i {String dateTime this.timeList.get(i);if (dateTime ! null){this.timeList.set(i, format(dateTime));}}}}else{this.isFormart true;}}private String format(String datetime){if (datetime ! null){// 是否含有减号boolean hasSubtrSign datetime.contains(-);// 是否含有冒号boolean hasColonSign datetime.contains(:);// 12-23 12:33if (hasSubtrSign true hasColonSign true){datetime DateUtil.formatToEnglish(datetime);}else if (hasSubtrSign hasColonSign false){datetime DateUtil.formatToEnglish(datetime);}else if (hasSubtrSign false hasColonSign){datetime DateUtil.formatToEnglish(datetime).substring(11);}}return datetime;}}/////Timer代码import java.util.ArrayList;public class Timer extends Thread{private boolean isStart false;private boolean isCannel false;ArrayList tasks new ArrayList ();public Timer(){}public void cancel(){this.isCannel true;}public boolean isCannel(){return isCannel;}public void schedule(TimerTask task, long period){task.setPeriod(period);//添加任务this.addTask(task);}public void schedule(TimerTask task, long delay, long period){try{Thread.sleep(delay);}catch (Exception e){}task.setPeriod(period);//添加任务this.addTask(task);}public void schedule(TimerTask task, String time){task.setTime(time);//添加任务this.addTask(task);}public void schedule(TimerTask task, long delay, String time){try{Thread.sleep(delay);}catch (Exception e){}task.setTime(time);//添加任务this.addTask(task);}public void schedule(TimerTask task, java.util.List timeList){task.setTimeList(timeList);//添加任务this.addTask(task);}public void schedule(TimerTask task, long delay, java.util.List timeList){try{Thread.sleep(delay);}catch (Exception e){}task.setTimeList(timeList);//添加任务this.addTask(task);}//添加任务private void addTask(TimerTask task){boolean isExist false;for (TimerTaskBean ttBean: this.tasks){if (task.equals(ttBean.getTask())){isExist true;break;}else{isExist false;}}if (!isExist){tasks.add(new TimerTaskBean(task, false));}//判断定时器线程是否启动if (!this.isStart){this.start();this.isStart true;}}public void run(){// 是否取消所有任务的定时功能while (!this.isCannel){for (int i 0; i {TimerTaskBean ttBean tasks.get(i);//判断是否开始运行if (ttBean ! null !ttBean.isRun()){ttBean.setRun(true);new Thread(ttBean.getTask()).start();}}}//当取消定时器时取消所有任务if (this.isCannel){for (TimerTaskBean ttBean: tasks){ttBean.getTask().cancel();}}}class TimerTaskBean{public TimerTaskBean(){}public TimerTaskBean(TimerTask task, boolean isRun){this.task task;this.isRun isRun;}private boolean isRun false;private TimerTask task null;public boolean isRun(){return isRun;}public void setRun(boolean isRun){this.isRun isRun;}public TimerTask getTask(){return task;}public void setTask(TimerTask task){this.task task;}}}//TimerTest代码import java.util.ArrayList;public class TimerTest{public static void main(String[] args){Timer t new Timer();T1 t1 new T1();T2 t2 new T2();t.schedule(t1, 1000);ArrayList list new ArrayList ();list.add(11:44:30);list.add(11:44:31);list.add(11:44:32);list.add(11:44:33);list.add(11:44:34);list.add(11:44:35);list.add(11:44:36);list.add(11:44:37);t.schedule(t1, list);try{Thread.sleep(1000 * 4);}catch (Exception e){}t1.cancel(); //取消任务1,任务2线程停止t.schedule(t2, 1000);t.schedule(t2, list);try{Thread.sleep(1000 * 4);}catch (Exception e){}t2.cancel(); //取消任务2,任务2线程停止try{Thread.sleep(1000 * 4);}catch (Exception e){}t.cancel(); //取消定时器,定时器线程停止}}class T1 extends TimerTask{public T1(){}public void execute(){System.out.println(11111111);}}class T2 extends TimerTask{public T2(){}public void execute(){System.out.println(22222222);}}以上就是今天的全部内容想知道更多详细java基础知识就请继续关注我们了解详情吧。推荐阅读
