Optional makes a method contract explicit for a caller, however, one may find such signature too verbose. Update: Java 8 includes the class java.util.Optional out-of-the-box, so there is no need to …

613 I am trying to do something in Java and I need something to wait / delay for an amount of seconds in a while loop.

May 24, 2016 · Afaik, Java and most typed languages don't overload methods or functions based on return type. For instance public int getValue(String name){} is indistinguishable from public boolean …

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 being …

However a static method/field can be called only on the type directly, say like this: The previous statement is not correct. One can also refer to static fields with an object reference like …

Mar 6, 2017 · I am wondering when to use static methods? Say if I have a class with a few getters and setters, a method or two, and I want those methods only to be invokable on an instance object of the …

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 invoking it. I want some …

The common way is to make the private method protected or package-private and to put the unit test for this method in the same package as the class under test. Guava has a @VisibleForTesting …

Consider a method signature like: public String myFunction(String abc); Can Mockito help return the same string that the method received?

May 28, 2012 · I am writing a method that should accept as its parameter an object of one of two types which do not share a parent type other than Object. For example, the types are Dreams and Garlic. …