public class genericity {
    public static class Box<T> {
        private T t;
        public void add(T t) {
            this.t = t;
        }
        public T get() {
            return t;
        }
        public static void main(String[] args) {
            Box<Integer> integerBox = new Box<Integer>();
            Box<String> stringBox = new Box<String>();
            integerBox.add(17);
            stringBox.add(new String("Hello World"));
            System.out.printf("Integer Value :%d\n", integerBox.get());
            System.out.printf("String Value :%s\n", stringBox.get());
        }
    }
}

public class genericity {
    public static <T extends Comparable<T>> T maximum(T x, T y, T z){
        T max = x;
        if (y.compareTo(max) > 0){
            max = y;
        }
        if (z.compareTo(max) > 0){
            max = z;
        }
        return max;
    }
    public static void main(String[] args) {
        System.out.printf( "Max of %d, %d and %d is %d\n",
                13, 14, 17, maximum( 13, 14, 17 ) );
        System.out.printf( "Maxm of %.1f,%.1f and %.1f is %.1f\n",
                5.5, 2.2, 7.7, maximum( 5.5, 2.2, 7.7 ) );
        System.out.printf( "Max of %s, %s and %s is %s\n",
                "Shea", "Good", "Yeats", maximum( "Shea", "Good", "Yeats" ) );
    }
}

public class genericity {
    public static void getData(List<?> data) {
        System.out.println("data :" + data.get(0));
    }
    public static void main(String[] args) {
        List<String> name = new ArrayList<String>();
        List<Integer> age = new ArrayList<Integer>();
        List<Number> number = new ArrayList<Number>();
        name.add("Yeats");
        age.add(17);
        number.add(17.17);
        getData(name);
        getData(age);
        getData(number);
    }
}