未能调用测试类中的方法

Question

我试图为复数创建一个复杂的类。在创建了给出两个复数乘积的mult方法后，它无法运行。在下面的代码中，当我将s定义为：s=mult(u，v(时，eclipse指向一个错误，我不明白为什么。有人能帮忙吗？

package gestion.complexe;
public class Complexe {
double reelle,imag;
public Complexe(double reelle,double imag) {
this.reelle=reelle;
this.imag=imag;
}
public Complexe() {
this(Math.random( )*(2-2),Math.random( )*(2-2));
}  
public String toString() {
String s=reelle+" + "+imag+"i";
return s;
}
// Sum of two complex
static Complexe somme(Complexe c1,Complexe c2) {
return new Complexe(c1.reelle+c2.reelle,c1.imag+c2.imag);
} 
// Product of two complex numbers
static Complexe mult(Complexe u,Complexe v ) {
return new Complexe(u.reelle*v.reelle- 
u.imag*v.imag,u.reelle*v.imag+u.imag*v.reelle);
}
public boolean estReel(Complexe z) {
return z.imag==0;    
}
// magnitude of two complex numbers 
public double module () {
return Math.sqrt(this.reelle*this.reelle + this.imag*this.imag);
}

}

这是等级测试

package gestion.complexe;
// Test Class
public class Test {
public static void main(String[] args) {
Complexe u=new Complexe(1.0,1.0);
Complexe v=new Complexe(3.0,4.0);
Complexe r=new Complexe(1.0,0.0);
// The problem is the next line, eclipse point error
Complexe s=mult(u,v);
System.out.println(s.toString());
}
}

谢谢你的帮助。

Answer 1

mult是Complexe类的静态函数。要使用它，您必须使用类作为前缀，如下所示：

Complexe s = Complexe.mult(u, v);