local variables unavailable
public class myCanvas extends Canvas
{
........
public myCanvas (Composite arg0, int arg1)
{

Timer t = new Timer();
MyTask task = new MyTask (this);
t.schedule(task, 600, 200);
}

};
public class MyTask extends TimerTask
{

myCanvas c;
MyTask (myCanvas c)
{
super();
c = t;
}

public void run()
{

System.out.println("aaa");
c.redraw();
//每次运行到redraw 时总是显示 local variables unavailable
//不要redraw这一句就运行的很好,谁知道是为什么?


}
}