May 12, 2010 · overloaded constructors - as a result of overloading methods and constructors, some may be private and some public. Especially in case when there is a non-public class that …

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. Builder …

Dec 20, 2010 · To make it explicite: if you write your own constructor, java will not create the default constructur. So if you need a constructor with arguments and a constructor without …

64 You can make a deep copy with serialization without creating files. Your object you wish to deep copy will need to implement serializable. If the class isn't final or can't be modified, …

Java provides you with a default constructor which takes no parameters. The constructor also has no body, so it is something like so: public Person() {}. The moment you define you own …

Jan 14, 2010 · It doesn't do any good to just mark the constructor private; a really determined user may always use reflection to obtain the constructor. Valid uses: One good use of a protected …

Jun 23, 2015 · You make a constructor private if you want the class to be instantiated just from its own members usually a static block or static method. It means that you take control of …

Nov 4, 2008 · 76 Yes it can have a constructor and it is defined and behaves just like any other class's constructor. Except that abstract classes can't be directly instantiated, only extended, …

Nov 13, 2008 · Calling a constructor from another constructor in Java is primarily a means of providing default values for parameters to the one constructor that should actually construct …

Sep 25, 2013 · If you want to make sure that any instance created is always valid and any member variables are always initialized,then you would define the constructor which initializes …