Thread: Need help understanding how Java uses expressions and how they evaluate

Hi,

Hopefully this is a simple one. I have a section of code:

int x = 17;
int y = 9;
String name = "Robinson";
String bird = "Robin";

My task is to explain what each expression evaluates to, but more importantly why. The 2 expressions I am having trouble with are:

name == bird + "son";

and

name.equals(bird + "son");

I have checked both statements in the application I am using and the first statement evaluates to False and the second evalutes to True. I'm not really undestanding how these expressions are working as I would expect both statements to evaluate as true?

Any help is greatly appreciated!

thanks

Hi,

thanks very much for the reply. I think I understand what you are saying there. I'm still having trouble understanding why the statement:

name == bird + "son";

evaluates to False, I have got to that answer by running the code through the application I am using.

The way I am reading it would suggst an answer of True, in that name = Robinson, bird + son would be Robin and son, so Robinson, but I guess I'm missing something with how the "+" operator works in this example?

Am I missing something here?

Cheers

ahh, great, got it!

Thanks for the help