在Groovy中,为什么以及如何将ArrayList分配给HashMap变量起作用?

时间:2018-11-22 07:15:39

标签: groovy

我在Groovy中有以下代码违反了我的逻辑:

HashMap<Integer,NLevelDynamicAlias> nLevelAliases = new ArrayList<>();

这实际上是一个错字。但是代码运行良好,直到我将代码复制到Java方法之前,我才意识到它。

Groovy如何使其工作?那是强制的一部分吗?

1 个答案:

答案 0 :(得分:0)

时髦的“魔术”))

尝试此代码:

func navigation(_ navigation: SYNavigation, didUpdate positionInfo: SYPositionInfo?) {
        if (mapRoute != nil){
            mapView.remove(mapRoute)
            computeRoute(from: startPointMP, to: endPointMP)
        }
    }

func computeRoute(from fromCoordinate: SYGeoCoordinate, to toCoordinate:
    SYGeoCoordinate) {
    let startWaypoint = SYWaypoint(position: fromCoordinate, type: .start, name: "Begin")
    let endWaypoint = SYWaypoint(position: toCoordinate, type: .end, name: "End")
    let routingOptions = SYRoutingOptions()
    routingOptions.transportMode = .unknown// For other options see SYTransportMode
    routingOptions.routingType = .economic// For other options see SYRoutingType
    routing.computeRoute(startWaypoint, to: endWaypoint, via: nil, with: routingOptions)
}


func routing(_ routing: SYRouting, didComputePrimaryRoute route: SYRoute?) {
    SYNavigation.shared().start(with: route)
    // You might want to put it also on the map
    mapRoute = SYMapRoute(route: route!, type: .primary)
    markerEnd = SYMapMarker(coordinate: endPointMP!, image: UIImage(named: "Arrive")!)
    mapView.add(mapRoute)
    mapView.add(markerEnd)
    mapView.add(markerStart)
    mapView.cameraMovementMode = .free
}

您会收到一个错误:

  
    

...由于:groovy.lang.GroovyRuntimeException:         找不到与以下对象匹配的构造函数:java.util.HashMap(java.lang.Integer,java.lang.Integer,java.lang.Integer)

  

意味着groovy尝试使用左侧的ArrayList中指定的参数在左侧查找类型的构造函数