array for each loop problem

[Kunal Choudhary]

Hey guys!!
below is my program....i wonder why the output is 0030


public class testscjp {


public void myfunc()
{
int []arr={1,2,3,4};

for(int i:arr)
{

arr[i]=0;
}
for(int i :arr)
{
System.out.println(i);
}
}

public static void main(String args[])
{
testscjp tcjp = new testscjp();
tcjp.myfunc();

}

}

any help is greatly appreciated!!!

[Florin Florentin]

it should be 0000. what you want to do with this prog?

[Kunal Choudhary]

i also suspected it to be 0000....but look at the s.o.p....it prints the value of i and not the value of arr[i]

[Campbell Ritchie]

When there is "testscjp" in the name of the file, we need to know where it came from. Is that an exam question?

[Kunal Choudhary]

testscjp is the name of the file which i made in my program...this question is from the mock exam....

[Ernest Friedman-Hill]

Kunal Choudhary wrote:testscjp is the name of the file which i made in my program...this question is from the mock exam....

You need to tell us which mock exam, or the thread will be deleted. Furthermore, I'm going to move this to the SCJP forum.

[Kunal Choudhary]

this is from deepak bala's mock exam...also does it matter if the question is from mock exam....it's a java question rite??? it's your wish if you want to move it to scjp thing....but do keep me posted....what if i had not named the class scjptest???

[Kunal Choudhary]

i am only concerned with the solution...however, i would keep in mind where to post the question from the next time

[Henry Wong]

also does it matter if the question is from mock exam....it's a java question rite???

Yes, it matters. Some "mocks" violates copyrights -- ie. posting them would be illegal.

it's your wish if you want to move it to scjp thing....but do keep me posted....

It's already done. Notice that you are now in the SCJP forum.

what if i had not named the class scjptest???

If you were unable to tell us which mock, then this topic would have been deleted.

Henry

[Kunal Choudhary]

can i please get a reply to my question....if the moving around thing is over.....i was impressed when you said ."It would have been deleted"....

[Joanne Neal]

Think what the value of i will be each time thru your first loop and the answer should become clear.

[Kunal Choudhary]

thanks neal....i got it....

[sweety sinha]

i didn't get it. please explain.

thanks in advance

[Kumar Ala]

Try adding the following s.o.p and check you can understand how it is setting the same array value a[1],a[3]

for(int i:arr)
{
System.out.println("i Value "+ i+ "Inside set array loop"+ arr[i]);
arr[i]=0;
}

Hope this helps...

[Ankit Garg]

This question has been asked a lot of time earlier

https://coderanch.com/t/427832/Programmer-Certification-SCJP/certification/Enhanced-Loop-Array

https://coderanch.com/t/418167/Programmer-Certification-SCJP/certification/Array

https://coderanch.com/t/418029/Programmer-Certification-SCJP/certification/Arrays
....

Please do some searching on the forum before you ask a question...

[Ankit Garg]

Java Ala, please change your name to meet the javaranch naming policy...