I keep seeing the following when I look up why use wrapper classes: Objects are needed if we wish to modify the arguments passed into a method (because primitive types are passed by value). if we set the parameter to the return value we can modify the primitive everything in java is passed by value What does the statement actually
Tag: wrapper
what is wrapper function and how to use it?
For my homework, I am required to use a function called wrapper function to validate the parameter for a recursive function, which I don’t understand what it means. All i understand from wrapper function is it does nothing but just wraps around a function eg: I dont even know if the code above is the correct implementation for wrapper, but
Exceptions or null in java
I have the next doubt. According to good practices of java, how to manage the cases in which the object can not be found and we want to know why. For example, if someone has problems logging in our system and we want to inform them exactly what is the problem, we cannot return null because we lose the reason
Using Streams with primitives data types and corresponding wrappers
While playing around with Java8’s Streams-API, I stumbled over the following: To convert an array of primitive wrapper classe objects into a Stream I just have to call Stream.of(array). But to convert an array of primitive data types, I have to call .of(array) from the corresponding wrapper (class) stream class (<– that sounds silly). An example: My question(s): Why is
Simple way to get wrapper class type in Java
I have a piece of code where I need to pass the class of a field in a method. Because of the mechanics of my code I can only handle reference objects and not primitives. I want an easy way of determining if a Field’s type is primitive and swap it with the appropriate wrapper class. So in code what