Can a class add a method to itself at runtime (like from a static block), so that if someone is performing reflection on this class, they'll see the new method, even though it wasn't defined at …

I have a Java class. How can I unit test it? In my case, I have a class that calculates a binary sum. It takes two byte[] arrays, sums them, and returns a new binary array.

Nov 28, 2012 · In Java 8, methods can be created as Lambda expressions and can be passed by reference (with a little work under the hood). There are plenty of examples online with lambdas …

Now for this string, you could use a method like myString.setText("String");, or myString.equalsIgnoreCase(otherString);. Now, for my question, is it actually possible to …

Jul 20, 2011 · Do you think it is possible to create something similar to this? private ArrayList increaseSizeArray (ArrayList array_test, GenericClass) { array_test.add (new GenericObject …

Dec 4, 2009 · System.out.println("Method is finished!"); Internally I'm using a class that implements Runnable and do some Reflection work to get the correct method object and …

Feb 9, 2014 · Can the method trible inside the class Trible be static? This will avoid having to create an object new Trible() as you could just call the static method: Trible.trible("X"). On a …

Jun 8, 2009 · Update: Java 8 includes the class java.util.Optional out-of-the-box, so there is no need to use guava for this particular reason in Java 8. The method name is a bit different though.

Is there a way to create an instance of a particular class given the class name (dynamic) and pass parameters to its constructor. Something like: Object object = …

As well as using the techniques above which add a field to the enumerated type you can also use a pure method based approach and polymorphism. This is more "OOP style" but I would not …