what is the first character in java code example

Example 1: java get last char of string

public class Test {
    public static void main(String args[]) {
        String string = args[0];
        System.out.println("last character: " +
                           string.substring(string.length() - 1)); 
    }
}

Example 2: get first character of string java

var string = "freeCodecamp";

string.charAt(0); // Returns "f"