Which constructor is called and why?

public classTestConstruct {

     publicTestConstruct(Integer a) {

           System.out.println("It is an Integer");

     }

     publicTestConstruct(long b) {

           System.out.println("It is a long");

     }

     publicTestConstruct(int...x) {

           System.out.println("It is a int...");

     }

     public static voidmain(String[] args) {

           new TestConstruct(8);

     }

}

Output:

It is a long

Reason:

The general thumb rule is Widening (smaller primitive data type)> Autoboxing (wrapper) > Varargs.

public class TestConstruct {

            public TestConstruct(Integer a) {

                        System.out.println("It is an Integer");

            }

            public TestConstruct(longb) {

                        System.out.println("It is a long");

            }

            public TestConstruct(int... x) {

                        System.out.println("It is an int...");

            }

            public TestConstruct(intb) {

                        System.out.println("It is an int");

            }

           

            public static void main(String[] args) {

                        new TestConstruct(8);

            }

}

Output:

It is an int