[metric]

Hi guys,

I came across this line and I do not understand what it means:

return t == null ? null : t.element;

Thanks
Metric

[nick2price]

Its just using different operators. In java, there is a lot of situtations where people use if else loops. Its commonly if something is true, return something, else, return something else. What you have showed is a shortcut to perform everything in one statement. The way it works is that it checks everything before the ? So, t == null. If this is true, it will return null. If it is false, it will return t.element. So if you look at it, you can say check this (everything before ?) and return one of these (the two values either side of the

[immeraufdemhund]

and you seperate the if it's true and if it's false with a :

[metric]

Ah!

Nifty!! Thanks guys =D +1 for you guys

metric

[pbl]

metric, on 18 June 2011 - 11:19 AM, said:

I came across this line and I do not understand what it means:

return t == null ? null : t.element;

I barely use that syntax, I really prefer

if(t == null)
   return null;
else
   return t.element;

However in a method call it is usefull, it avoids to create temporary variables.

boolean answer;

System.out.printf("The answer was: %s", answer ? "Yes: : "True");

rather than

String yesNo;
if(answer)
   yesNo = "Yes";
else
   yesNo = "No";
System.out.printf("The answer was: %s", yesNo);

This post has been edited by pbl: 18 June 2011 - 11:08 AM