在上一篇文章【java swing 内置浏览器打开网页显示flash图表-swt Browser应用】中我们讲解了如何在java中打开网站，但是，在实际开发中右遇到了一个问题就是如何用程序改变已经打开的网页地址，下面把自己解决问题的方法讲解一下。
首先我在程序中直接调用 Browser对象的setUrl方法，代码如下：
browser.setUrl("http://www.xxx.cn");
程序会抛出如下异常：
Exception occurred during event dispatching: org.eclipse.swt.SWTException: Invalid thread access at org.eclipse.swt.SWT.error(SWT.java:3884) at org.eclipse.swt.SWT.error(SWT.java:3799) at org.eclipse.swt.SWT.error(SWT.java:3770) at org.eclipse.swt.widgets.Widget.error(Widget.java:463) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:355) at org.eclipse.swt.browser.Browser.checkWidget(Browser.java:164) at org.eclipse.swt.browser.Browser.setUrl(Browser.java:973) at zhinengkaiguanjiankong.comm.SWTPane.StartThread(SWTPane.java:42) at zhinengkaiguanjiankong.RealTimeSwitchDetailChart.jbtn_searchActionPerformed(RealTimeSwitchDetailChart.java:292) at zhinengkaiguanjiankong.RealTimeSwitchDetailChart.access$200(RealTimeSwitchDetailChart.java:32) at zhinengkaiguanjiankong.RealTimeSwitchDetailChart$2.actionPerformed(RealTimeSwitchDetailChart.java:186) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6267) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6032) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178) at java.awt.Dialog$1.run(Dialog.java:1046) at java.awt.Dialog$3.run(Dialog.java:1098) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Dialog.show(Dialog.java:1096) at java.awt.Component.show(Component.java:1563) at java.awt.Component.setVisible(Component.java:1515) at java.awt.Window.setVisible(Window.java:842) at java.awt.Dialog.setVisible(Dialog.java:986) at zhinengkaiguanjiankong.RealTimeSwitchDetailChart$4.run(RealTimeSwitchDetailChart.java:315) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
该解决方案被否定，以失败告终。
然后又在网上baidu,google了一下，发现问题如下：
在非SWT线程的线程里想要修改SWT界面,都要通过上面类似的办法来做,不然就会报错的,解决方法如下：
Display.getDefault().syncExec(new Runnable() { public void run() { browser.setUrl("http://www.ccc.cn"); } });
最主要是红色字体的地方代码，大家注意一下。
