java - java 构造函数不工作

Question

如果我尝试将参数放在以下行，我会收到错误

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

当有一个名为 Sum 且具有 3 个参数的构造函数时，为什么我会收到此错误

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);
    }

}

Answer 1

double[] Sum(int num1,int num2, int num3) 

不是构造函数

你想要这个:

public Sum(int num1,int num2, int num3) 

这是构造函数的示例:

http://www.homeandlearn.co.uk/java/class_constructor.html