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Constructors Output Test

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Constructors Output Test
What will be the output of the following program?
class ConstructorsTest
    public static void main(String[] args)
        U u = new U();
        U u1 = new U(1);
        V v = new V();
        V v1 = new V(1);
        T t = new T();
        T t1 = new T(1);

class U {
    V v = new V();

    U() { System.out.print("U"); }

    U(int i) { System.out.print("u");}

class V {
    V() { System.out.print("V"); }

    V(int i) { System.out.print("v"); }

class T extends V {

    T() { System.out.print("T"); }

    T(int i) { System.out.print("t"); }

A. UuVvVTvt
D. Compilation Error
E. Runtime Error - goes into infinte loop
Topic: Inheritance And Constructors In Java

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User comments below. All of them might not be correct.

ans is C,,

Posted by Raju VarshnEy    2014-11-03 04:39:46

ans c. objects for all the classes created in main class.1st object U() executed and prints VU bcz inside class U Clas V() obj default constructor printd.2 nd prints Vu.3 rd prints V,4 th prints v,5th prints VT because T extends V.,6 th prints vt

Posted by Maheshwari Natarajan    2014-11-03 05:49:10


Posted by Nichitha Veludandi    2014-11-03 07:51:58


Posted by Shubham Bansal    2014-11-03 11:42:36

Ans is we have 4 classes and these classes have 2 different constructors...

here in these classes constructor overloading occur sam name with different type n num n order of args

1st we are creating instance for the U and in this class we are creating the instance for the class V without any args so that default constructor in that class wil get executed and printed V..
and Constructor in class U get printed next we are creating instance for the U by passing the value so that 1 arg constrctr in U wil get executed....

next we are creating instance for the V than default constructor wil get executed....similar to v also...

Next we are creating instance for class T than default construcotor in its parent clas wil get executed here V is Parent for T...VT get creating instance with 1 arg so that again parent class default cons wil printed next 1arg cons in T get printed

Posted by Uday Kumar    2014-11-03 16:18:20

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Posted by Merit Campus    2014-11-04 03:57:14

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