Constructors

Whenever an instance is created in the method, it is called the constructor of that particular class and is executed by default.

If the user has not written/provided any constructor, the compiler will automatically insert the empty constructor.

A method name similar to its respective class name and method does not return any value.

Overloading is possible but not overriding.

An example of a Java program with a constructor chain

The following is an example of a constructor chain in a Java program:

package MyFirstPackage;

class SampleClass4 {
  SampleClass4(){
  System.out.println("executing sample meathod");
}
 }
class SampleClass3 extends SampleClass4 {
   SampleClass3(){
      System.out.println("executing sample method 2");
    }
  }

public class Constructors {
  public static void main(String[] args) {
    new SampleClass3();
  }
}

The output for the preceding code is as follows:

executing sample meathod
executing sample method 2