Java / OOP / Static - https://www.minte9.com/java/oop-introduction-static-1184

static.java

/** 
Define MyMath.floor() method using java.lang.math method

class App {
    public static void main(String[] args) {
        double n = MyMath.floor(12.3);
        System.out.print(n); // 12.0
    }
}
*/

// SOLUTION

class MyMath {
    public static Double floor(Double no) {
        return Math.floor(no);
    }
}