What is a constructor in Java?

Constructors are similar to methods but,

• They do not have any return type.
• The name of the constructor is same as the name of the class.
• Every class has a constructor. If we do not explicitly write a constructor for a class, the Java compiler builds a default constructor for that class.
• Each time a new object is created, at least one constructor will be invoked.
• A class can have more than one constructor.

Example

public class Puppy {
   public Puppy() {
   }
   public Puppy(String name) {
      // This constructor has one parameter, name.
   }
}