simpletimetask.java

javahomework(source).rar

public abstract class SimpleTimeTask
{
	private boolean isValid;	
	
	SimpleTimeTask(boolean isValid)
	{
		this.isValid=isValid;
	}
		
	public void start()
	{
		if(isValid())
			run();
	}
	
	public void pause()
	{
		synchronized(this)
		{
			this.isValid=false;
		}
	}
	
	public void goOn()
	{
		synchronized(this)
		{
			this.isValid=true;
		}
	}
	
	public boolean isValid()
	{
		boolean tmp;
		synchronized(this)
		{
			tmp=isValid;
		}
		return tmp;
	}

	public abstract void run();
}