@SuppressWarnings versus //noinspection

I may have an answer to my own question.  I am a newbie when it comes to using Java annotations so I am just reporting my observations.

If I have a statement like this:

List<String> a = (List<String>)b.getSomething();

IDEA will insert @SuppressWarnings:

@SuppressWarnings({"unchecked"}) List<String> a = (List<String>)b.getSomething();

If I have a statement like this:

doSomething((List<String>)b.getSomething());

IDEA will disable the warning like this:

//noinspection unchecked
doSomething((List<String>)b.getSomething());

At the statement level, it looks like I can only apply the annotation to an assignment of a local variable.  So I have to rewrite my statement to be something more like this:

@SuppressWarnings({"unchecked"}) List<String> a = (List<String>)b.getSomething();
doSomething(a);

ASAIK @SuppressWarnings annotation only works on Class and Method level
(plus some others by definition, but not on a statement @see
ElementType).

Idea adds the possibility of supressing inspection alerts on a per
statement level, which is very nice. But they had to introduce
something new, and it's the //noinspection "tag".

cheers

On 2009-11-26 07:06:58 +0900, Ed Hager <ed.hager@gmail.com> said:

I am using IDEA 8.1.4.  I have unchecked warnings turned on in my
Errors settings.

When I have an unchecked warning and I click the option to "Suppress
for Statement", sometimes IDEA inserts "//noinspection unchecked"
before the statment and sometimes it inserts
"@SuppressWarnings({"unchecked"})" at the beginning of the statement.  
I don't understand why it behaves differently in different classes.  Is
there a way that I can tell IDEA to always insert the annotation
@SuppressWarnings?

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Original message URL: http://www.jetbrains.net/devnet/message/5250982#5250982

very grateful for your help