How to Sell java return function to a Skeptic
Yes! Java return functions are the most powerful return expression ever created. No matter how much you have invested in a database, you will never get much return value out of a Java return function.
Java return functions are a powerful tool for anyone who uses the language. But you need to know how to use them. So I’m going to tell you how to use them, and you will be well rewarded with a return function that does something a little bit different. You’ll also gain some insight into why return functions are such a great tool for programmers everywhere.
Here’s the problem with Java return functions: If you make a call to a method that returns value, and the value you get back from that call is not what you expected, then you’re screwed. You might get a “null pointer exception” or similar unexpected behaviour. So how do we fix this? Simple, with an if statement. We could use a switch statement in this case.
The problem with Java return functions is that sometimes you only get a return value, not a value. That means that when you try to use your code to get a value from that method, you get null instead of the expected value.
In java, the return value of a function is a value of type java.lang.Object. So if you try to get a value from a return value function, you’ll get null. And that’s what we want to fix.
The fix is quite simple: we can replace the return statement with if statements. In java, if statements must use a case statement as part of the statement. This is to prevent a null value from being returned. With this fix, youll get a value when you get a return value from a returning function.
Java’s return statement is a bit different than C#’s. There’s a few reasons for this. First, in C# returns are checked at compile time, whereas in java they are checked at run time. In C#, a null value will get thrown out of the method, whereas in java, youll get a default value if there’s no return statement. Second, in C#, if you don’t return a value the function will terminate.
I think that it was the first time Java came up in a discussion about Java’s return statements, but it does make sense that C would be more restrictive and Java would be more lax. When the compiler does its check at compile time, it can’t throw out a null value, so it has no way of knowing what youre returning.
While my java experience is limited to only a few games at my college, Ive used it in a number of projects over the years. One of the ways I use it is to force an int value to be a specific value and then check the value later. This is my favorite use. For example, my game class has a method to return a specific value. If it returns a string, I check to see if it is null and then assign a specific value.