StackOverflow2013

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primarykey
Id
11623832
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0
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0
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CreationDate
2012-07-24T03:43:24.630
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0
LastActivityDate
2012-07-24T03:43:24.630
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0
OwnerUserId
377270
ParentId
11623616
PostTypeId
2
Score
1
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0
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text
Body
I see a few problems with your function; first, you don't declare <code>gobj</code> within the method body. You made a comment elsewhere that makes me think that you're trying to <code>return</code> a data member of the class; that's odd design, to say the least. (Normally, the goal is to have each method stand on its own as much as possible. If you're sharing data like this, you risk introducing bugs that are difficult to find later.) Your function does not always return data -- sometimes it'll just fall off the end of the function without an explicit <code>return</code> statement. You might know that one of those four conditions will always be true, but the compiler does not -- and honestly, it'll be correct as you'll inevitably break that condition in the future. This code is difficult to write in a way that makes it more beautiful. (Well, if Java's <a href="http://docs.oracle.com/javase/tutorial/java/nutsandbolts/op2.html" rel="nofollow"><code>||</code> operator</a> worked with <code>null</code> as well, this could be a very beautiful short function. But Java's <code>||</code> only works with <code>true</code> and <code>false</code>.) Probably the easiest way to re-write the function is to remove the guard after the last attempt: <pre><code>private GObject getCollidingObject() { GObject gobj; gobj = getElementAt(ball.getX(),ball.getY()); if (gobj != null) { return gobj; } gobj = getElementAt(ball.getX()+BALL_RADIUS,ball.getY()); if (gobj != null) { return gobj; } gobj = getElementAt(ball.getX(),ball.getY()+BALL_RADIUS); if (gobj != null) { return gobj; } gobj = getElementAt(ball.getX()+BALL_RADIUS,ball.getY()+BALL_RADIUS); return gobj; } </code></pre> This way, you'll execute at least one <code>return</code> no matter which path you take through the function.
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1. POThis method must return a result of type GObject - but just look -- I told it to --
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1. PTAnswer
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1. USsarnold
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