These are two unrelated concepts. A final object is one that is not subject to inheritance (in the case of a class), may not be overridden (in the case of a member function), or not subject to change once set (in the case of an instance of a class). A constructor allows an instance to be loaded with values when the object is created. A final member variable may be set only once, and may never be altered after that point. This can eliminate certain classes of programming bugs. For example, java.lang.Math.PI should never change (it is a constant value), so accidentally assigning a value to this symbol should result in an error.
No. Java does not support copy constructor
Yes, you can have more than one constructor with a different set of parameters.
No. if you wish to create an object that you plan on using in a java program then the answer is NO. You cannot initialize an object of a Java class without calling the constructor.
No.
A constructor is a method that is invoked when an object is created. As to being mandatory, that really depends on the programming language; in the case of Java, each class must have a constructor, however, in many cases Java will automatically provide a default constructor, so you don't really need to program it.
No. Java does not support copy constructor
Yes, you can have more than one constructor with a different set of parameters.
When any constructor is deffined in your class, the java compiler create a default no argument constructor for you. This constructor only have an invocation to the super class constructor (" super( ) ").
All Java programs would have a constructor... public class Test { public Test(){ ... } ..... } This is a constructor. Even if you dont code the constructor Java would automatically place a default constructor for compilation.
Constructor is used to do something (written in constructor) immediately after object creation.
Every class, including abstract classes, MUST have a constructor. The different types are: a. Regular constructors b. Overloaded constructors and c. Private constructors
No. if you wish to create an object that you plan on using in a java program then the answer is NO. You cannot initialize an object of a Java class without calling the constructor.
No.
NO, we cannot create a contructor for an interface in java.
Java, unlike C++ does not support copy constructors.
Constructor is not an alternative to class. In Java, you create classes; the classes contain methods - including the constructor, which can be viewed as a special method. If you want to have a constructor, you need a class that surrounds it, so it's not one or the other.
A constructor is a method that is invoked when an object is created. As to being mandatory, that really depends on the programming language; in the case of Java, each class must have a constructor, however, in many cases Java will automatically provide a default constructor, so you don't really need to program it.