[{"createTime":1735734952000,"id":1,"img":"hwy_ms_500_252.jpeg","link":"https://activity.huaweicloud.com/cps.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=V1g3MDY4NTY=&utm_medium=cps&utm_campaign=201905","name":"华为云秒杀","status":9,"txt":"华为云38元秒杀","type":1,"updateTime":1735747411000,"userId":3},{"createTime":1736173885000,"id":2,"img":"txy_480_300.png","link":"https://cloud.tencent.com/act/cps/redirect?redirect=1077&cps_key=edb15096bfff75effaaa8c8bb66138bd&from=console","name":"腾讯云秒杀","status":9,"txt":"腾讯云限量秒杀","type":1,"updateTime":1736173885000,"userId":3},{"createTime":1736177492000,"id":3,"img":"aly_251_140.png","link":"https://www.aliyun.com/minisite/goods?userCode=pwp8kmv3","memo":"","name":"阿里云","status":9,"txt":"阿里云2折起","type":1,"updateTime":1736177492000,"userId":3},{"createTime":1735660800000,"id":4,"img":"vultr_560_300.png","link":"https://www.vultr.com/?ref=9603742-8H","name":"Vultr","status":9,"txt":"Vultr送$100","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":5,"img":"jdy_663_320.jpg","link":"https://3.cn/2ay1-e5t","name":"京东云","status":9,"txt":"京东云特惠专区","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":6,"img":"new_ads.png","link":"https://www.iodraw.com/ads","name":"发布广告","status":9,"txt":"发布广告","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":7,"img":"yun_910_50.png","link":"https://activity.huaweicloud.com/discount_area_v5/index.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=aXhpYW95YW5nOA===&utm_medium=cps&utm_campaign=201905","name":"底部","status":9,"txt":"高性能云服务器2折起","type":2,"updateTime":1735660800000,"userId":3}]
public class Taks02 { public static void main(String[] args) { double a, b, c,
s; Scanner sc = new Scanner(System.in); System.out.print("a = "); a = sc.
nextDouble(); System.out.print("b = "); b = sc.nextDouble(); System.out.print(
"c = "); c = sc.nextDouble(); // 调用三角形面积计算方法，传入实际参数a，b，c s = getTriangleArea(a,
b, c); // 实际参数（actual parameter），简称实参 // 根据返回值判断是否构成三角形 if (s != -1) { System.
out.println("s = " + s); } else { System.out.println("提示：构不成三角形！"); } } /** *
三角形面积计算方法 * * @param a 形式参数（formal parameter），简称形参 * @param b 形式参数（formal
parameter），简称形参 * @param c 形式参数（formal parameter），简称形参 * @return 三角形面积 */
private static double getTriangleArea(double a, double b, double c) { double s,
p; // 判断能否构成三角形 if (a + b > c && b + c > a && c + a > b) { p = (a + b + c) / 2;
s= Math.sqrt(p * (p - a) * (p - b) * (p - c)); // sqrt: square root } else { s =
-1; } return s; } }
结果：
