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Key from a Value in Java?
Am I to understand there's no simple way to get a Key from a Value? There are entire Stackoverflow debates over best practices and workarounds but they're making my head spin🤯 Please take a glance at my code and let me know if I'm missing something in the Hashmap lessons. Keep in mind my experience level is low🤓 Thanks 😊 https://code.sololearn.com/cPRILC2BHT0u/?ref=app
3 Respuestas
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System.out.println(band.get("banjo"));
Here you get null because the get() method expects a key. "banjo" is a value.
System.out.println(band.get("Bubba"));
//output banjo
Another possibility to get the keys:
https://code.sololearn.com/c7BrlKiE1Uxp/?ref=app
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Yes. That's the sense of a map.
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Thank you for your response, Denise Roßberg , so am I to understand from your answer that trying to get the key by calling the value is the problem?
That you can only, ever, get a value by calling a key, and not the other way around?