Write the missing code in the following class definitions. Then implement a test class to

test your code.

Note: ThreeDPoint should inherits Point class. Also, methods of ThreeDPoint should

reuse Point class's methods.

public class Point $\{$

private int x;

private int y;

public Point $()\{$

$//$x $=0,$ y $=0$

$\}$

public Point$($int x$1,$ int y$1)\{$

$\}$

public void print$()\{$

$\}$

System.out.print$("("+$ x $+","+$ y $+")")$;

public String toString$()\{$

return x $+""+$ y $+""$;

$\}$

public void setPoint$($int x$1,$ int y$1)\{$

$\}$

public int getPointX$()\{$

$\}$

public int getPointY$()\{$

$\}$

$\}$

public class ThreeDPoint $\backslash$square $\{$

private int z;

$//$x $=0,$ y $=0,$ z $=0$

public ThreeDPoint $()\{$

$\}$

$//$x $=$ x$1,$ y $=$ y$1,$ z $=$ z$1$

public ThreeDPoint $($int x$1,$ int y$1,$ int z$1)\{$

$\}$

$//$output x$,$ y$,$ z

public void print$()\{$

$\}$

public String toString$()\{$

$\}$

$//$x $=$ x$1,$ y $=$ y$1,$ z $=$ z$1$

public void setThreeDPoint $($int x$1,$ int y$1,$ int z$1)\{$

$\backslash$square

$\}$