How to map String variable to name of an integer? [duplicate]

Question

Suppose I have a String Variable like this in Java:

String cat = "felix";

int felix = 6;

Is there some way in Java that I could compare the contents of cat - "felix" to the name of the int variable felix?

No, there is not. At least not with variable names. We can, however, use a Map<String, Integer>. — Turing85
– Turing85, Commented Jan 3, 2022 at 21:21

Ofek · Accepted Answer · 2022-01-03 21:29:19Z

0

There is no way to do it with the method you are doing, but you can use hashmap:

Map<String,Integer> myMap = new HashMap<>();
myMap.put("felix", 6);
myMap.put("another key", -4);
int value = myMap.get("felix");
System.out.println(value);//prints 6
value = myMap.get("abc");//throws null pointer exception

edited Jan 3, 2022 at 21:29

answered Jan 3, 2022 at 21:24

Ofek

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1 Comment

Turing85 Over a year ago

This approach is not null-safe. If no mapping for a given String exists, it will throw a NullPointerException (Ideone demo). It is also not what OP asked for. We should rather ask for clarification in the comments instead of posting speculative answers.

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