How do I compare strings in Java?

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linda cummings cummingslinda14@gmail.com 2016-9-10

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回答： Image Analyst 2016-9-10

I've been using the == operator in my program to compare all my strings so far. However, I ran into a bug, changed one of them into .equals() instead, and it fixed the bug.

Is == bad? When should it and should it not be used? What's the difference? cummingslinda14 at gmail.com

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Answer 1

Image Analyst 2016-9-10

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It's not bad. It just depends on what you want to do. That compares strings, as character arrays, on a character by character basis. There are other string functions that do it differently, like strcmp() and strcmpi() and strfind(). I encourage you to look those up in the help to see exactly what they do and how they differ from "==" and to see which is the right operation to do for your current need.