用java编写一个三角形类，能根据三个实数构造三角形对象，如果三个实数不满足三角形 的条件，则自动构造以最小值为边的等边三角形。输入任意三个数，输出构造的三角形面积。

public class Triangle {
    private double a;
    private double b;
    private double c;

    public Triangle(double a, double b, double c) {
        if (a + b <= c || a + c <= b || b + c <= a) {
            // 不满足三角形条件，构造最小值为边长的等边三角形
            this.a = this.b = this.c = Math.min(Math.min(a, b), c);
        } else {
            this.a = a;
            this.b = b;
            this.c = c;
        }
    }

    public double getArea() {
        double p = (a + b + c) / 2; // 半周长
        return Math.sqrt(p * (p - a) * (p - b) * (p - c)); // 海伦公式求面积
    }
}

测试代码：

public class TestTriangle {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double a = scanner.nextDouble();
        double b = scanner.nextDouble();
        double c = scanner.nextDouble();
        Triangle triangle = new Triangle(a, b, c);
        System.out.println(triangle.getArea());
    }
}