Minu Sam

Actual exam is really very easy i wrote my exam yesterday and scored 91%.i was being tested on really easy stuff but from what i remember many problems were related to overriding, instanceof operator so if you get basics good..you should be good to go.I remember when i wrote my 1st practice test from KB book..i scored 39% and i was so upset.but as you keep doing test you realize where to look for weakness and then you gradually improve.

I do not know the fees in India..but here in US i paid $300.
I had about 150 mins to finish 60 questions.

I wrote my test today(May 14th 2012) No drag and drop questions

All.

I cleared SCJP with 91%...thanks to all the members!!!If i can help anyone in any way let me know.
I studied for 3 months ..did enthuware test..i was averaging about 65% but actual test was very easy!

-Minu

All,

can someone explain me why line 2 wont compile.
If line 1 works fine..even line 2 should work right??

void addTest(List<? super Dog> list) { list.add(new Dog()); list.add(new Animal());//Line1 list.add(new Object());//Line2 } class Dog { } class Animal extends Dog { }

Line1 compiles fine.
Thanks

Henry,

Appreciate your response, however can you please explain what you mean by lower bounds?I still dont understand

I am having hard time understanding generics.
Could someone explain why line 2 compilation fails.??

public class TestingGeneric { /** * @param args */ public static void main(String[] args) { addAnimal(new Animal()); addAnimal(new Dog()); } static <T extends Animal> void addAnimal(T t) { } //Doesnt compile -Line 2 static <P super Animal> void addAgainWithSuper(P p) { }
}
Assuming Dog extends Animal

Please see code below

public class AirJet { public static void main(String[] args) { Engine e; } class Engine { } }

I had a question since in the static method there is no this reference.I should not be even able to have a reference type of Engine.
It doesnt give a compilation error.However if i try to instantiate as in

public static void main(String[] args) { Engine e=new Engine(); }

it gives compilation error which makes sense.But why would the first case compile.I was thinking that i always need to access the inner class from a static method as OuterClassName.InnerClassMName, isnt that true?

Question 2:

I am trying to download examlab scjp 6 test , however i keep getting error file not found.Would appreciate if someone could help me.

All,

Please look below:I have question why is the last line( arr2 = (int[])o1; ) in the code..not a compile time error rather it is a runtime error.


int[][] arr1 = new int[3][]; int[] arr2 = new int[3]; Object o1 = arr1; arr2 = (int[])o1;

Will appreciate any input.

Hi All

I am preparing for my Java certification.I came across a question which i did not understand so thought would discuss with members.

Say i have the method
private void m1() { intValueTest(1);//Line 1 } public short intValueTest(short s) { return 1; //Line2}

Line 1 causes compiler error since it treats parameter in Line 1 as an integer and cannot narrow it to byte which i understand.
Now on Line 2 i am returning 1 which i thought should be treated like an integer and the compiler should complain about not being able to typecast to the return type short.

Can someone explain me??