how to get last substring fro the strinng 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: str.substring last 2 java

String substring = str.length() > 2 ? str.substring(str.length() - 2) : str;