Iterating through strings

Question

In Java, How can I look through each character in a string with a for loop? Or assign a variable to a specific character within the string?

Answer 1

String input = "Hallo";

for (int i = 0; i < input.length(); i++) {
if (input.charAt(i) == 'a') {
// Do stuff if reach char a
}

Answer 2

String s = "hello";

//use .charAt()
char c = s.charAt(3); //l

//loop from 0 to length - 1
for(int i = 0; i < s.lengt(); i++){

System.out.println(s.charAt(i));
}

You can also get a char array from the string:

char[] letter = s.toCharArray();

Answer 3

Look also here for other string methods: https://docs.oracle.com/javase/7/docs/api/java/lang/String.html

Answer 4

Awesome. Thanks guys I was really getting fed up cause I couldn't do a thing with strings other than printing them 😅
I also think that would be the problem with a lot of other beginners learning on solo learn because none of it is found on the lessons.

Answer 5

Presenting all methods would go beyond the scope of the courses.
It is important that you learn to use java documentation in addition to SL.
Here are a few other Java resources:

https://www.sololearn.com/discuss/580291/?ref=app

Answer 6

Not all methods but just a few like this one and also datatype conversion would also be good.
Thanks for the references, appreciate it.