class Main {
    public static void main(String[] args) {
        String a = "rust";
        // equals compares contents (never use == for text)
        System.out.println(a.equals("rust"));
        System.out.println(a.equalsIgnoreCase("RUST"));
        // compareTo orders lexicographically
        System.out.println("apple".compareTo("banana") < 0);
    }
}

equals, equalsIgnoreCase, compareTo