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How do I use != in java strings [closed]

My code has a validator which states that if "d" is entered display an error message. If "c", "s", or "v" are entered do the calculation. How can I construct gender.equalsIgonreCase to include all words and letters that are not "c", "s", or "v"?

gender.equalsIgonreCase

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c

s

v

gender.matches("(?i)[a-z&&[^csv]]")

gender

"d"

"s"

"v"

"c"

boolean genderCheck1 = false, genderCheck2 = false, genderCheck3 = false;

3 Answers
3

You could use String.matches(String) which takes a regular expression to validate gender. Like

String.matches(String)

gender

boolean isCSV = gender.matches("[CcSsVv]");
if (!isCSV) {
// It isn't C, c, S, s, V or v
}


gender

else

!

You probably would be better going with the String.matches(String) option as mentioned above by @Elliott Frisch but just some constructive criticism, you should look up a couple of java tutorials thenewboston youtube channel has tons of very good tutorials.

If your going to learn Java you should really try learn all the basic stuff you could save yourself so many headaches in the future as you'd have a better idea of what you can use to solve your problems ..

all the String methods() ect ..

you can use "else" :

if(gender.equals("C")){
....
}
else if(gender.equals("S")){
....
}
else{
.....
}


or you can use !gender.equals("d"):

!gender.equals("d")

if(!gender.equals("d")){
.....
}