Triangle类）设计一个继承了抽象类GeometricObject的新的Triangle类。绘制Triangle类和GeometricObject类的UML图并实现Triangle类。编写测试程序，提示用户输入三角形的三条边，颜色以及一个表明该三角形是否填充的布尔值。程序应该使用这些边来创建一个Triangle对象，并根据用户的输入来设置color和filled属性。程序应该显示面积，周长，颜色以及表明是否被填充的真或假的值

以下是Triangle类和GeometricObject类的UML图：


以下是Triangle类的实现：

public class Triangle extends GeometricObject {
    private double side1;
    private double side2;
    private double side3;
    
    public Triangle() {
        this.side1 = 1.0;
        this.side2 = 1.0;
        this.side3 = 1.0;
    }
    
    public Triangle(double side1, double side2, double side3) {
        this.side1 = side1;
        this.side2 = side2;
        this.side3 = side3;
    }
    
    public double getSide1() {
        return side1;
    }
    
    public double getSide2() {
        return side2;
    }
    
    public double getSide3() {
        return side3;
    }
    
    public void setSide1(double side1) {
        this.side1 = side1;
    }
    
    public void setSide2(double side2) {
        this.side2 = side2;
    }
    
    public void setSide3(double side3) {
        this.side3 = side3;
    }
    
    public double getArea() {
        double s = (side1 + side2 + side3) / 2.0;
        return Math.sqrt(s * (s - side1) * (s - side2) * (s - side3));
    }
    
    public double getPerimeter() {
        return side1 + side2 + side3;
    }
    
    @Override
    public String toString() {
        return "Triangle: side1 = " + side1 + " side2 = " + side2 + " side3 = " + side3;
    }
}

以下是测试程序的实现：

import java.util.Scanner;

public class TestTriangle {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        
        System.out.print("Enter side1: ");
        double side1 = input.nextDouble();
        System.out.print("Enter side2: ");
        double side2 = input.nextDouble();
        System.out.print("Enter side3: ");
        double side3 = input.nextDouble();
        
        System.out.print("Enter color: ");
        String color = input.next();
        
        System.out.print("Is the triangle filled (true / false)? ");
        boolean filled = input.nextBoolean();
        
        Triangle triangle = new Triangle(side1, side2, side3);
        triangle.setColor(color);
        triangle.setFilled(filled);
        
        System.out.println("Area: " + triangle.getArea());
        System.out.println("Perimeter: " + triangle.getPerimeter());
        System.out.println("Color: " + triangle.getColor());
        System.out.println("Filled: " + triangle.isFilled());
    }
}