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2. super() in Java - Stack Overflow

   stackoverflow.com/questions/3767365

   super () is used to call the immediate parent. super () can be used with instance members, i.e., instance variables and instance methods. super () can be used within a constructor to call the constructor of the parent class. OK, now let’s practically implement these points of super (). Check out the difference between program 1 and 2.

3. How do I call one constructor from another in Java?

   stackoverflow.com/questions/285177

   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 your object, and then it should be enough to just assign values in the constructor's body.

4. Java Constructor Inheritance - Stack Overflow

   stackoverflow.com/questions/1644317

   35. When you inherit from Super this is what in reality happens: public class Son extends Super { // If you dont declare a constructor of any type, adefault one will appear. public Son () { // If you dont call any other constructor in the first line a call to super () will be placed instead. super (); } }

5. Using 'this' keyword in Java constructors - Stack Overflow

   stackoverflow.com/questions/9967437

   In the constructor, this (...) is like a method call for constructors. The compiler chooses which constructor to call based on the number and types of the arguments you use. When you use this as a reference, it means this object, and which constructor was used is not important. You can think of the this keyword as a placeholder.

6. Java Constructors - Stack Overflow

   stackoverflow.com/questions/579445

   CommentedMar 9, 2009 at 15:47. 3. I generally put my constructors up near the top of my file, after package, import, Javadoc, and static/instance variable declaration sections. gear, cadence, and speed are the class variables, presumably defined outside of the constructor somewhere. startCadence, startSpeed, and startGear are also variables ...

7. How to directly initialize a HashMap (in a literal way)?

   stackoverflow.com/questions/6802483

   You can use static block to initialize a map with some values. Example : public static Map<String,String> test = new HashMap<String, String> static { test.put ("test","test"); test.put ("test1","test"); } With Java 9 or more. You can use Map.of () method to initialize a map with some values while declaring.

8. Do I really need to define default constructor in java?

   stackoverflow.com/questions/3641114

   A default (no-argument) constructor is automatically created only when you do not define any constructor yourself. If you need two constructors, one with arguments and one without, you need to manually define both. Link to the docs: "You don't have to provide any constructors for your class, but you must be careful when doing this. The compiler ...

9. Can a constructor in Java be private? - Stack Overflow

   stackoverflow.com/questions/2816123

   171. Yes, a constructor can be private. There are different uses of this. One such use is for the singleton design anti-pattern, which I would advise against you using. Another, more legitimate use, is in delegating constructors; you can have one constructor that takes lots of different options that is really an implementation detail, so you ...

10. Java default constructor - Stack Overflow

    stackoverflow.com/questions/4488716

    2. When we do not explicitly define a constructor for a class, then java creates a default constructor for the class. It is essentially a non-parameterized constructor, i.e. it doesn't accept any arguments. The default constructor's job is to call the super class constructor and initialize all instance variables.

11. What is the meaning of "this" in Java? - Stack Overflow

    stackoverflow.com/questions/3728062

    this is a keyword in Java. Which can be used inside method or constructor of class. It (this) works as a reference to a current object whose method or constructor is being invoked. this keyword can be used to refer any member of current object from within an instance method or a constructor.