Java, multiple letters assigned to one variable

Question

I'm working on a while-loop which should check a text and see if letters are in CAPS or not as well as if they are vowels etc. I'm not sure of how to create a variable which can store certain letters. I asked this question yesterday an was told to use Array, but im wondering theres anyway to do this with help of Strings,charAt.

If you have a string (like `String foo = "abc"`), you can iterate through characters with a loop like `for (int i=0; i — rrobby86, Mar 17 '17 at 07:40

dumbPotato21 · Answer 1 · 2017-03-17T07:49:53.177

1

You can do this without a loop :-

String s = "HELLO";
if(s.toUpperCase().equals(s)){
    System.out.println("String is All-CAPS!");
}

edited Mar 17 '17 at 07:49

answered Mar 17 '17 at 07:40

dumbPotato21

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But in this case you should know that after call s.toUpperCase() String s will be changed to UpperCase – Vugar Suleymanov Mar 17 '17 at 07:43
@VugarSuleymanov No, it won't. `Strings` are **immutable**. [here](http://stackoverflow.com/questions/1552301/immutability-of-strings-in-java) – dumbPotato21 Mar 17 '17 at 07:44

score 0 · Answer 2 · answered Mar 17 '17 at 07:41

0

Yes you can just iterate over the String with charAt() for every position. If you have a String text:

for(int i = 0; i < text.length() ; i++){
    char currentChar = text.charAt(i);
    doSomething(currentChar);
}

answered Mar 17 '17 at 07:41

leurer

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Java, multiple letters assigned to one variable

2 Answers2