Fun with floats

FunWithFloats.java

import java.util.Objects;

public class FunWithFloats {
    public static void main(String[] args) {
        float f1 = 0.7f;
        System.out.println(f1); // prints 0.7

        double d = f1;
        System.out.println(d); // prints 0.699999988079071

        float f2 = (float)d;
        System.out.println(f2); // prints 0.7

        System.out.println(f1 == f2); // true
        System.out.println(Objects.equals(f1, f2)); // true

        System.out.println(d == f1); // true
        System.out.println(Objects.equals(d, f1)); // false

        System.out.println(d == f2); // true
        System.out.println(Objects.equals(d, f2)); // false
    }
}