package geometricobjects; import java.util.$*$; class GeometricObjects $\{$ private String color; private boolean filled; public GeometricObjects$()\{$ this.color $=$ "white"; this.filled $=$ false; $\}/*$ Construct Geometric Object with specified color and filled value $*/$ public GeometricObjects$($String color, boolean filled$)\{$ this.color $=$ color; this.filled $=$ filled; $\}/*$ Return Color $*/$ public String getColor$()\{$ return color; $\}/*$ Return filled. Since filled is boolean we name it isFilled $*/$ public boolean isFilled$()\{$ return filled; $\}/*$ Set new color $*/$ public void setColor$($String color$)\{$ this.color $=$ color; $\}/*$ Set new filled $*/$ public void setFilled$($boolean filled$)\{$ this.filled $=$ filled; $\}/*$ toString method that returns the string representation of object. This method also fetches the values of color and filled$---$ i$.$e$.$ works like a getter too $*/$ @Override public String toString$()\{$ return "Object color is: $"+$ this.getColor$()+"$ object filled is: $"+$ this.isFilled$()$; $\}\}$ class Triangle extends GeometricObjects $\{$ private double side$1,$ side$2,$ side$3$; public Triangle$($double side$1,$ double side$2,$ double side$3,$ String color, boolean filled$)\{$ super$($color$,$ filled$)$; this.side$1=$ side$1$; this.side$2=$ side$2$; this.side$3=$ side$3$; $\}$ public Triangle$()\{$ super$()$; this.side$1=1$; this.side$2=1$; this.side$3=1$; $\}//$ Accessors public double getA$()\{$ return this.side$1$; $\}$ public double getB$()\{$ return this.side$2$; $\}$ public double getC$()\{$ return this.side$3$; $\}$ public double getPerimeter$()\{$ return side$1+$ side$2+$ side$3$; $\}$ public double getArea$()\{$ double s $=($side$1+$ side$2+$ side$3)/2$; double area $=$ s $*($s $-$ side$1)*($s $-$ side$2)*($s $-$ side$3)$; return Math.sqrt$($area$)$; $\}$ @Override public String toString$()\{$ return "Triangle: side$1="+$ side$1+"$ side$2="+$ side$2+"$ side$3="+$ side$3$; $\}\}$ class TestTriangle $\{$ public static void main$($String$[]$ args$)\{$ try $($Scanner sc $=$ new Scanner$($System$.$in$))\{$ System.out.print$("$Enter color of Triangle: $")$; String color $=$ sc$.$next$()$; System.out.print$("$Is Triangle filled? $($true$/$false$)$: $")$; boolean filled $=$ sc$.$nextBoolean$()$; System.out.print$("$Enter side$1$: $")$; double side$1=$ sc$.$nextDouble$()$; System.out.print$("$Enter side$2$: $")$; double side$2=$ sc$.$nextDouble$()$; System.out.print$("$Enter side$3$: $")$; double side$3=$ sc$.$nextDouble$()$; $//$ Create object Triangle t$1=$ new Triangle$($side$1,$ side$2,$ side$3,$ color, filled$)$; System.out.println$($t$1)$; System.out.println$("$Is Triangle filled? $"+$ t$1.$isFilled$())$; System.out.println$("$Color of the Triangle: $"+$ t$1.$getColor$())$; System.out.println$("$Area of the Triangle: $"+$ t$1.$getArea$())$; System.out.println$("$Perimeter of the Triangle: $"+$ t$1.$getPerimeter$())$; $\}\}\}$