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當看完這篇文章Vaadin "A connector with id xy is already registered"後,我已經嘗試實現由何塞·路易斯·建議的解決方案......NullPointerException異常overiding的ConnectorTracker.getConnectorTracker
但我得到這樣的痕跡:
java.lang.NullPointerException
at com.vaadin.server.AbstractClientConnector.markAsDirty(AbstractClientConnector.java:138)
at com.vaadin.ui.AbstractComponent.setWidth(AbstractComponent.java:844)
at com.vaadin.ui.AbstractSingleComponentContainer.setWidth(AbstractSingleComponentContainer.java:210)
at com.vaadin.ui.AbstractComponent.setSizeFull(AbstractComponent.java:817)
at com.vaadin.ui.UI.<init>(UI.java:253)
at com.vaadin.ui.UI.<init>(UI.java:238)
at my.package.ui.MyUI.<init>(MyUI.java:72)
,其中線72對應於:
public class MyUI extends UI
有人可以幫助理解爲什麼這些痕跡?
如果需要,我可以提供更多代碼。
信息:
public class MyUI extends UI {
private final MyConnectorTracker tracker = new MyConnectorTracker(
this);
@Override
public ConnectorTracker getConnectorTracker() {
return this.tracker;
}
}
爲什麼這與春季有關? –
@AndreiStefan它被糾正了,你能否消除這個問題的負面影響? – Manu