Answer Posted / jag bhushan

yes,
we can have constructor in abstract class.
But we can not make instance of the abstract class.
instead we can make a reference to that abstract class.
and when we make a new object of the class which extends
the abstract class, the constructor of abstract class get
called.

see the code for example:

public abstract class TestAbstract {

TestAbstract(){

System.out.println("...in abstract class'
constructor");
}

public abstract void showAbstract();
public void show(){
System.out.println("...in show");
}
}


public class Test extends TestAbstract{
public static void main(String[] args) {

TestAbstract ta = new Test(); // onstructor
call
ta.showAbstract();
ta.show();

}

public void showAbstract() {
System.out.println("...in showAbstract");

}

}

What is jpa specification?

925

---

Explain java coding standards for methods?

991

---

What is mvc in java?

963

---

How does split work in java?

997

---

Can we assign integer value to char in java?

965

---

Which method must be implemented by all threads?

1199

---

What is final int?

959

---

Can we declare a class as static?

1048

---

Why heap memory is called heap?

1000

---

What is diamond operator in java?

902

---

What is sortedmap in java?

983

---

What does java edition mean?

1052

---

How we can execute any code even before main method?

1086

---

Give a brief description of java socket programming?

912

---

Can we change the scope of the overridden method in the subclass?

1327

---