java自行实现单线程定时器

由于timer类实现的定时器是多线程的，这容易造成错误。所以实现了个单线程的定时器，虽然有点误差。

1、任务执行接口

package TimerManager;

public interface ICmd {
public void excute();
}


2、任务基类
package TimerManager;

public class TaskCmd implements ICmd{
protected long excuteTime;
protected int times;

public TaskCmd(int delay, int times){
this.excuteTime = delay * 1000 + System.currentTimeMillis();
this.times = times;
}

@Override
public void excute() {

}

}
3、时间管理类：package TimerManager;

import java.util.ArrayList;

public class TimerManager {

private static ArrayList<TaskCmd> taskList = new ArrayList<TaskCmd>();
private static ArrayList<TaskCmd> delList = new ArrayList<TaskCmd>();

public static void addTask(TaskCmd task){

taskList.add(task);
}

public static void loop(){
for(TaskCmd task : delList){
taskList.remove(task);
}

long nTime = System.currentTimeMillis();
for(TaskCmd task : taskList){
if(task.excuteTime <= nTime){
task.excute();
--task.times;

if(task.times <= 0)
delList.add(task);
}
}
}

}

4、任务类

package test;
import TimerManager.*;

public class testTask extends TaskCmd{

<span style="white-space:pre">	</span>public testTask(int delay, int times) {
<span style="white-space:pre">		</span>super(delay, times);
<span style="white-space:pre">		</span>
<span style="white-space:pre">		</span>
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>
<span style="white-space:pre">	</span>@Override
<span style="white-space:pre">	</span>public void excute() {
<span style="white-space:pre">		</span>System.out.println("111");
<span style="white-space:pre">	</span>}

}

5、mian函数循环

package test;
import TimerManager.*;

public class test {
<span style="white-space:pre">	</span>public static void main(String[] args) {

<span style="white-space:pre">			</span>TimerManager.addTask(new testTask(10,1));
<span style="white-space:pre">			</span>
<span style="white-space:pre">			</span>while(true){
<span style="white-space:pre">				</span>try {
<span style="white-space:pre">					</span>Thread.sleep(100);
<span style="white-space:pre">				</span>} catch (InterruptedException e) {
<span style="white-space:pre">					</span>e.printStackTrace();
<span style="white-space:pre">				</span>}
<span style="white-space:pre">				</span>
<span style="white-space:pre">				</span>TimerManager.loop();
<span style="white-space:pre">			</span>}
<span style="white-space:pre">	</span>}

}