Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

// Generic class
class Pair<A, B> {
    private final A first;
    private final B second;

public Pair(A first, B second) {
        this.first  = first;
        this.second = second;
    }

public A getFirst()  { return first;  }
    public B getSecond() { return second; }

@Override
    public String toString() {
        return "(" + first + ", " + second + ")";
    }
}

// Generic method
class Utils {
    public static <T> T last(java.util.List<T> list) {
        if (list.isEmpty()) throw new java.util.NoSuchElementException();
        return list.get(list.size() - 1);
    }

public static <T extends Comparable<T>> T max(T a, T b) {
        return a.compareTo(b) >= 0 ? a : b;
    }
}

public class GenericsDemo {
    public static void main(String[] args) {
        Pair<String, Integer> p = new Pair<>("Age", 30);
        System.out.println("Pair: " + p);
        System.out.println("First: " + p.getFirst());

java.util.List<Integer> nums = java.util.List.of(1, 2, 3, 9, 4);
        System.out.println("Last: "  + Utils.last(nums));
        System.out.println("Max(7,3): " + Utils.max(7, 3));
        System.out.println("Max(apple,zebra): " + Utils.max("apple", "zebra"));
    }
}