java - 构造函数无法正常运行Java

如果我尝试将参数放在下一行，则会收到错误消息

Sum s1 = new Sum(1,5,6);

为什么有3个参数的Sum构造函数时会出现此错误

package test;

class Sum {
    double num1,num2,num3;
    double[] result = new double[4];
   double[] Sum(int num1,int num2, int num3) {
        this.num1 = num1;
        this.num2 = num2;
        this.num3 = num3;
        result[0] = num1;
        result[1] = num2;
        result[2] = num3;
        result[4] = num1+ num2 + num3;
        return result;
    }
}

public class Test {
    public static void main(String[] args) {
        Sum s1 = new Sum(1,5,6);
    }

}

最佳答案

您的构造函数具有返回类型，构造函数没有return语句。你需要改变

public Sum(int num1,int num2, int num3) {
        this.num1 = num1;
        this.num2 = num2;
        this.num3 = num3;
        result[0] = num1;
        result[1] = num2;
        result[2] = num3;
        result[3] = num1+ num2 + num3;
    }