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I feel like we're going in circles. What have you tried? Where are you stuck? What did google and the basic tutorials tell you? Please read the link in my signature on asking questions the smart way...

You continue doing the things we've asked you not to do, and you haven't even answered our warnings about your misuse of the if statements. If you want help, you'll have to post an SSCCE that...

Are you sure that works? You're still ending all of your if statements with a semicolon. And you still haven't used the highlight tags.

Well, you've got quite a few syntax errors there, and you haven't used the highlight tags, so I can't really tell which closing bracket lines up with which opening bracket. Make sure that they match...

What syntax are you attempting to use? An if statement requires (parenthesis) around the expression, and you can't just throw a comma in. Did you read the basic tutorials at all, or just skim them?
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Then that's a great place to start your google search. The first result here is to the basic tutorials, which I actually already told you to take a look at:...

Okay, so now that you've stated those, you can begin translating that to pseudocode and finally into actual Java.

I mean, given three numbers, how do you determine whether or not they can form a triangle? When can't three sides form a triangle?

Well, how would you do this without a computer?

For future reference, you're going to want to provide more meaningful titles. We know you need help- what do you need help with? What have you tried? A title lets people know what's in the thread, so...