C++ doesn’t have reflection, and if something isn’t public in a class, you can’t get to it [within “non-tricks” C++ – and with tricks, it means using things like “knowing it’s 18 bytes into the structure, which will break as soon as you use a slightly different architecture, or someone alters the singleton, or some … Read more
Reflection provides objects (of type Type) that encapsulate assemblies, modules and types. You can use reflection to dynamically create an instance of a type, bind the type to an existing object, or get the type from an existing object and invoke its methods or access its fields and properties I have Used reflection for dynamically … Read more
You need to use reflection. Here’s a sample: static void Main(string[] args) { string obj1 = “a string”; int obj2 = 12; DateTime obj3 = DateTime.Today; object[] obj_array = { obj1, obj2, obj3 }; foreach (object obj in obj_array) { //Print value Console.WriteLine(“Value: ” + obj.ToString()); //Print property names Console.WriteLine(“Property Names:”); foreach (PropertyInfo prop in … Read more
Before you read any further I suggest you check out AutoMapper. AutoMapper is designed to map data from one type to another. From what I see, this is what you are trying to accomplish. One note of caution, AutoMapper does not perform a deep copy on lists. So if you modify the list on the … Read more
Seriously, why are you using reflection if you need to set the field value from a variable you own? Okay, let’s forget that… If you have a field and not a property, you need to use GetField: var value = “5.5”; var field = this.GetType().GetField(nameof(Momentum), BindingFlags.NonPublic); field.SetValue(self /* or this */, value); Also, this might … Read more
Try not to use reflect. But if you must use reflect: A reflect.Value value has a Type() function, which returns a reflect.Type value. If that type’s Kind() is reflect.Map, that reflect.Value is a value of type map[T1]T2 for some types T1 and T2, where T1 is the key type and T2 is the element type. … Read more
Interface OnSystemUiVisibilityChangeListener is nested in class View, so I believe you would have to do Class.forName(“android.view.View$OnSystemUiVisibilityChangeListener”); (note the ‘$’). References: http://developer.android.com/reference/android/view/View.html http://developer.android.com/reference/android/view/View.OnSystemUiVisibilityChangeListener.html solved android Class.forName throws exception
The first parameter of Array.CreateInstance expects the element type of the array. You pass the entire property type, which is, as you have just found out by checking property.PropertyType.IsArray, an array type (specifically, Bar[] – i.e. an array of Bar elements). To get the element type of an array type, use its GetElementType method: var … Read more
I have worked out a different way off doing it. To do it you make a new file let’s say it called ButtonDefinition and the code you would do to run it is new ButtonDefinition().ButtonDefinition1(); Then you would add in ButtonDefinition file if (main1.equals(“Test”)){ if (main2.equals(“Test2”)){ New Test().Test2(); } } So for each file you … Read more
Finally i find a way to do that. Follow the Go Playground and code snippet below: GO Playground: Avoiding Hard Coded Type Assertion //new approach SetAttribute, without any hard coded type assertion, just based on objectType parameter func SetAttribute(myUnknownTypeValue *interface{}, attributeName string, attValue interface{}, objectType reflect.Type) { // create value for old val oldValue := … Read more
Based on your exception, you aren’t passing any arguments to your class’ main method – System.out.println(Arrays.toString(args)); // <– to display your arguments. // Class<?> c = Class.forName(args[0]); // <– you should have a default Class<?> c = Class.forName(args.length > 0 ? args[0] : “java.lang.Object”); 3 solved Reflection – Exception in thread “main” java.lang.ArrayIndexOutOfBoundsException: 0
String.valueOf().length() returns 11 because that is the number of digits/characters in the output (i.e. [@936016386 – an address – has 11 characters) solved How do I properly test the char[ ] fields in my custom object for nulls, blanks, or empty? and Why do char[ ] indicate a length of 11?
It’s just 106 “public final static int int1 = int1value” in the first class. No List or Arrays. How lame! Unfortunately there is no neat way to sum the values of a large number of statics. You could do it using reflection (see @BalusC’s answer), or simply by writing a method evaluates hard-wired expressions like: … Read more