Nov 13, 2013 · 51 Constructors are used to initialize the instances of your classes. You use a constructor to create new objects often with parameters specifying the initial state or other …

Nov 2, 2012 · 4 putting if/else statements inside of both the constructor and setters are valid often used. It ensures that the object is never in an invalid state. As John3136 pointed out in the …

Dec 20, 2010 · The default constructor is the no-argument constructor automatically generated unless you define another constructor. Any uninitialised fields will be set to their default values. …

Feb 21, 2017 · I am confused with the this keyword in Java. If a class has two constructors and we use the this keyword in some method, the object represented by this is instantiated using …

To my knowledge, you can't mock constructors with mockito, only methods. But according to the wiki on the Mockito google code page there is a way to mock the constructor behavior by …

Nov 4, 2008 · The same case applies to abstract classes. Though we cannot create an object of an abstract class, when we create an object of a class which is concrete and subclass of the …

Jan 19, 2014 · A class that takes a required dependency as a constructor argument can only be instantiated if that argument is provided (you should have a guard clause to make sure the …

Feb 24, 2011 · What you describe isn't overriding. If you don't specify a default constructor, the compiler will create a default constructor. If it's a subclass, it will call the default parent …

Instead of defining and calling a private constructor from all other constructors, you could also define an instance initializer, which will automatically be called before every constructor. That …

Dec 12, 2008 · You can have a constructor in the abstract class that accepts the init parameters. The Java spec only specifies that the anonymous class, which is the offspring of the …