为什么此数组中的所有元素都具有相同的值？

Question

I have a program designed to convert weight on Earth into mass into weight on other planets. userWeight() , fileToken() , and printTable() are methods that are defined elsewhere in the program.

double earthWeight = userWeight();

// initialize arrays
String[] planet = {"Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"};

double[] gravity = new double[planet.length];
for(int index = 0; index < gravity.length; index++) {
    gravity[index] = Double.parseDouble(fileToken(index));
}

double[] mass = new double[planet.length];
for(int index = 0; index < mass.length; index++) {
    mass[index] = earthWeight * 453.59237 / (gravity[index] / gravity[2]);
}

double[] weight = new double[planet.length];
for(int index = 0; index < mass.length; index++) {
    weight[index] = mass[index] * (gravity[index] / gravity[2]) / 453.59237;
}

// print table
printTable(planet, gravity, weight);

All of the elements in weight have exactly the same value as earthWeight . They aren't supposed to be.

I think there is something wrong with this line:

weight[index] = mass[index] * (gravity[index] / gravity[2]) / 453.59273;

but I'm not sure.

Any help would be appreciated. Thanks!

Note: This is not a duplicate of All elements of this array are the same, but why? That person was writing in php, I am writing in Java. My question is specific to this program.

Answer 1

This guy mentioned in comment, that you have a reversed formula. If you will pass the mass[index] formula instead of the result value, you will see that nothing exists anymore except for the weight of Earth. :)