Count the number of characters in a String?

Question

I need to count the total number of characters of a String when the word is typed. I would like to know how to create the code, I believe it is a.

public class ExercicioDeString {
    public String transformarParaMaiusculo(String texto) {
    return texto.toUpperCase();
}

public String transformarParaMinusculo(String texto) {
    return texto.toLowerCase();
}

public String contarLetras(String texto) {

}

}

I tried using . lenght(); but could not.

Answer 1

Basic error of type.

If you want to resume a number in the function, it’s public int or public Integer and not public String

public Integer contarLetras(String texto) {
    return texto.length();
}

In addition the return in your code.

Already evade the question, but note that you have the primitive int and the class Integer in Java, depending on the intention you need to see which is best for each case.

Primitive only accepts numbers, class is nullable.

Answer 2

If only the string size:

 suaVariavel.length();

The error in your code is first that you are not returning or displaying the value, second, the data type must be integer, not string, so your function looks something like:

public int ContaCaracteres(String texto){
   return texto.length();
}