Contents
Can a method be an argument for another method?
We can’t directly pass the whole method as an argument to another method. Instead, we can call the method from the argument of another method. If we need to pass the actual method as an argument, we use the lambda expression. To learn more, visit Passing Lambda Expression as method argument in Java.
Can a program consist of only method calls?
The answer is no; there can only one “main” method – where “main” means an entry point you can “run”. You can code overloaded versions as in your example, but they can’t be “run”. There can be more than one main method in a single program.
How to write unit test by passing arguments to main?
Here I’ve introduced a new Interface, actually a Functional Interface with a single println (String val) method definition, called SysOutDelegate as a class field where I define its behaviour using a lambda (line 6). Anywhere I want to call System.out.println (“some message”), I now call sysOutDelegate.println (“some message”) instead.
Are there any problems writing a unit test?
There are two things that will cause you problems with testing your program. 1) The System.exit (1) will halt the application and return an exit condition back to the JVM. You probably don’t want to do this. 2) The observable output of your system is though System.out.println () statements.
How to mock method call inside a method for a JUnit test?
What I want to do for the JUnit is something like this (so the method getSize doesn’t actually get called within the getDetails method): However, the cDetails doesn’t get passed in to the ShapeUtility methods so this doesn’t work. Is there another way to do this?
What’s the best way to answer a question?
Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. To learn more, see our tips on writing great answers.