How do I get the last character of a string?

Question

How do I get the last character of a string?

public class Main {
    public static void main(String[] args)  {
        String s = "test string";
            


        

Answer 1

public String lastChars(String a) {
if(a.length()>=1{
String str1 =a.substring(b.length()-1);
}
return str1;
}