package cn.Douzi.Lab7_4;public class Triangle {        int a, b, c;    public Triangle(int a, int b, int c) {        super();        this.a = a;        this.b = b;        this.c = c;    }        int getArea() throws Exception {                if (a + b <= c || a + c <= b || b + c <= a) {            throw new IllegalArgumentException("两边之和大于第三边");        }        else {            int p = (a + b + c) / 2;            return (int)Math.sqrt(p * (p - a) * (p - b) * (p - c));        }            }    }

package cn.Douzi.Lab7_4;public class Lab4 {    public static void main(String[] args) {        // TODO Auto-generated method stub                Triangle tri = new Triangle(5, 1, 4);                try {            int area;            area = tri.getArea();            System.out.println("面积: " + area);                    } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {                    }    }}