switch depending on value inside function

Asked Dec 27 '16 at 00:30

Active Dec 27 '16 at 00:30

Viewed 34 times

I have a one-character string ch, and I want to return some integer depending of its value. I managed to make this if else statement using the regular expressions method .regex:

if (ch.matches("[AEILNORSTU]")){
            return 1;
        } else if (ch.matches("[DG]")){
            return 2;
        } else if (ch.matches("[BCMP]")){
            return 3;
        } else if (ch.matches("[FHVWY]")){
            return 4;
        } else if (ch.matches("[K]")){
            return 5;
        } else if (ch.matches("[JX]")){
            return 8;
        } else if (ch.matches("[QZ]")){
            return 10;
        } else return 0;

Is there a switch equivalent to this?

asked Dec 27 '16 at 00:30

Guilherme

@SotiriosDelimanolis Doesn't look like a real duplicate... – assylias Dec 27 '16 at 00:37
@assylias Alright let me find you something else. – Sotirios Delimanolis Dec 27 '16 at 00:39
@assylias How about [this](http://stackoverflow.com/questions/31497818/switches-in-java-can-i-include-a-condition-in-a-case)? – Sotirios Delimanolis Dec 27 '16 at 00:40
@SotiriosDelimanolis my point being that in this case, a series of `case "A": case "E": case "I":` etc. could work - or a hashmap of coerespondences, or an `int[26]`. This would not work for a more complex regex. – assylias Dec 27 '16 at 00:41
@assylias Something like [this](http://stackoverflow.com/questions/10873590/in-java-using-switch-statement-with-a-range-of-value-in-each-case) perhaps. – Sotirios Delimanolis Dec 27 '16 at 00:43
@SotiriosDelimanolis getting there ;-) – assylias Dec 27 '16 at 00:45
@assylias [This one](http://stackoverflow.com/questions/13774446/how-to-do-a-case-with-multiple-conditions)? That's all I'm going to look for. It's on you now. – Sotirios Delimanolis Dec 27 '16 at 00:46
1

FYI, you can use `"AEILNORSTU".contains(ch)` instead of `ch.matches("[AEILNORSTU]"`. – shmosel Dec 27 '16 at 00:49
@shmosel thanks, `contains` suits better this problem – Guilherme Dec 27 '16 at 10:44

switch depending on value inside function

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