I have wrote a print method which tell the user congratulates on their, but at the same time i have another field called Downloads, I wouls like to update the field downloads once the thr print method have been invoked, thanks and im using bluej
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2Is there a question? I can't see any apart from your `wishlist`. – Rohit Jain Oct 31 '12 at 19:07
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The implicit question is pretty clear, I think. "How do I update the `downloads` field once the print method has been invoked?" – asteri Oct 31 '12 at 19:10
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where is downloads field? the question is hard to comprehend until explained clearly. – Arham Oct 31 '12 at 19:13
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this is the field private int noOdDownloads; – tatu_kabo Oct 31 '12 at 19:15
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yes, so whats wrong in your existing code? It's doing exactly that. Also you could optimize your code by looking at gefei's answer – Arham Oct 31 '12 at 19:26
1 Answers
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instead of
int num;
this.noOdDownloads = num;
this.noOdDownloads = num + 1;
do
this.noOdDownloads++;
your original program has two problems: 1) num is not instantiated, this is what the compiler will complain, and 2) even if you instantiated it, say with int num=0;,
num is actually a local variable in the method. every time the method is run, the local variable is instantiated again and reset to 0. When you then assign its value to noOdDownloads, the latter is reset to 0 too.
gefei
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