(a) A constructor is similar to a method, but it has exactly the same name as the class (including the combination of uppercase and lowercase letters).
(b) It is placed inside the class definition.
(c) The constructor is invoked automatically when you create an object based on that class.
(d) To display a message, you can use the command System.out.println("Put message here")
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. Java does not support copy constructor
Because, the parent class also needs to be initialized when you create an object in the inheritance hierarchy.
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, we cannot create a contructor for an interface in java.
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( ) ").
To create objects of classes
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.
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.
No. Java does not support copy constructor
Because, the parent class also needs to be initialized when you create an object in the inheritance hierarchy.
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.
document.write("hello world")
No.
Java, unlike C++ does not support copy constructors.