public static void main(String[] args) {

            Triangle triangle = new Triangle(1, 1.5, 1);
            triangle.setColor("yellow");
            triangle.setFilled(true);

            System.out.println(triangle);
            System.out.println("The area is " + triangle.getArea());
            System.out.println("The perimeter is "
              + triangle.getPerimeter());
            System.out.println(filled);

          }
        }

        class GeometricObject {
            private String color = "yellow";
            private boolean filled;
            private java.util.Date dateCreated;

        /** Construct a default geometric object */
            public GeometricObject() {
                dateCreated = new java.util.Date();
            }
        /** Geometric object with specified color */
            public GeometricObject(String Color, boolean filled) {
                dateCreated = new java.util.Date();
                this.color = color;
                this.filled = filled;
            }

            public String getColor() {
                return color;
            }
        /** Set a new color */
            public void setColor(String color) {
                this.color = color;
            }
        /** Returned filled. Since filled is boolean, its get method is named is Filled*/
            public boolean isFilled() {
                return filled;
            }
        /** Set a new filled */
            public void setFilled(boolean filled) {
                this.filled = filled;
        /** Get dataCreated */
            }
            public java.util.Date getDateCreated() {
                return dateCreated;
            }
        /** Return a string representation of this object */
            public String toString() {
                return "created on " + dateCreated + "\ncolor: " + color + "and filled: " + filled;
            }

            }

        class Triangle extends GeometricObject {

            double side1 = 1.0;
            double side2 = 1.0;
            double side3 = 1.0;

            /** A no-arg constructor that creates a default triangle. */
            public Triangle (){
                side1 = 1.0;
                side2 = 1.0;
                side3 = 1.0;
            }
            /** A constructor that creates a triangle with the specified side1, side2, and side3. */
            public Triangle (final double side1, final double side2, final double side3){
                this.side1 = side1;
                this.side2 = side2;
                this.side3 = side3;
            }
            /** The accessor methods for all three data fields. */
            public void setSide1(final double side1) {
                this.side1 = side1;
            }
            public double getSide1(){
                return side1;
            }

            public void setSide2(final double side2) {
                this.side2 = side2;
            }
            public double getSide2(){
                return side2;
            }

            public void setSide3(final double side3) {
                this.side3 = side3;
            }
            public double getSide3(){
                return side3;
            }
            /** Method for Area */
            public double getArea() {
                double s = (side1 + side2 + side3)/2;
                double area = Math.sqrt(s * (s-side1) * (s-side2) * (s-side3));
                return area;
            }
            /** Method for perimeter */
            public double getPerimeter() {
                return side1 + side2 + side3;
            }
            /** Method for description */
            public String toString() {
                return "A Triangle with the following dimensions: (1, 1.5, 1).\n";
            }

            public boolean setFilled(){
                return filled;

            }




}