Write two Java classes that implement differently an abstract method of an interface.$$ This method calculates the distance between two points. The distance can be calculated as follows $($x$1,$ x$2,$ y$1,$ y$2$ are double variables$)$:

$1)$ Math.sqrt$(($y$2-$ y$1)*($y$2-$ y$1)+($x$2-$ x$1)*($x$2-$ x$1))$

$2)$ Point$2$D$.$distance$($x$1,$ y$1,$ x$2,$ y$2)$

Write a main method to test your code.