Constructors

  • Constructors are special method invoked when an object is created and are used to initialize them.
  • A constructor can be used to provide initial values for object attributes.
  • A constructor name must be same as its class name.
  • A constructor must have no explicit return type.
  • Example:-
    public class Vehicle{
           private String color;
           //constructor
           Vehicle(){
              color = "Red";    
         }
    }
  • The Vehicle() method is the constructor of our class , so whenever an Object of that class is created , the color attribute will be set to “Red“.
  • A constructor can also take parameters to initialize attributes.
  • Example:-
    class Person{
          private int age;
          public person(int mage){
                 age = mage;
      }
    }

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