selenium2java让浏览器停止加载的方法

package selenium;

import java.awt.AWTException;
import java.awt.event.KeyEvent;

public class StopLoading extends Thread{
    public void run() {
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        try {
            Library.getInstance().pressKeyEvent(KeyEvent.VK_ESCAPE);
        } catch (AWTException e) {
            e.printStackTrace();
        }
    }

}

Thread stop = new StopLoading();           
    stop.start();