What is a return data type?
In computer programming, the return type (or result type) defines and constrains the data type of the value returned from a subroutine or method. In many programming languages (especially statically-typed programming languages such as C, C++, Java) the return type must be explicitly specified when declaring a function.
What is T type Java?
In java means Generic class. A Generic Class is a class which can work on any type of data type or in other words we can say it is data type independent.
Which one of the following is true if onKeyDown returns false?
If onKeyDown returns false, the key-up event is cancelled. If onkeyDown returns false, the key-press event is cancelled. If onkeyPress returns false, the key-down event is cancelled.
Is it possible to return different objects dynamically?
You can just return different objects based on the role of the user. You can achieve any similar requirement where object return type needs to be set dynamically. Using this concept you do not need to worry about what method will return. We can return different objects dynamically on runtime.
Do you need to know the type of objects in a dynamic language?
In a dynamic language you don’t need to know what type an object is at compile time. Maybe you import some classes that you don’t know before hand, like you import all classes in a folder, like plugins or something. Or maybe even the type of an object depends on user-interaction.
Why do dynamically typed languages throw run time exceptions?
In dynamically typed languages it doesn’t care what the type is when you compile it, it’ll try to call the method you specified by name, if that method doesn’t exist on the object it’ll throw a run-time exception, so it’s up to the programmer to ensure that that doesn’t happen or handle it appropriately.
How to pass and return objects in Java?
Passing and Returning Objects in Java. In java, a method can return any type of data, including objects. For example, in the following program, the incrByTen( ) method returns an object in which the value of a (an integer variable) is ten greater than it is in the invoking object.