import org.netbeans.api.visual.action.ConnectProvider; //导入依赖的package包/类
public ExtendedConnectAction(ConnectDecorator decorator, Widget interractionLayer, ConnectProvider provider, long modifiers) {
    super(decorator, interractionLayer, provider);
    this.modifiers = modifiers;
}
 

import org.netbeans.api.visual.action.ConnectProvider; //导入依赖的package包/类
public ConnectAction (ConnectDecorator decorator, Widget interractionLayer, ConnectProvider provider) {
    this.decorator = decorator;
    this.interractionLayer = interractionLayer;
    this.provider = provider;
}