Step 1: Define the Class and the Method

First, you need to create a class named SphereVolumeCalculator. Then, we add a method calculateVolume inside the class which takes a single parameter, the radius of the sphere.

public class SphereVolumeCalculator {
    public double calculateVolume(double radius) {
    }
}

Step 2: Import Math Class

In Java, mathematical operations can be handled using the Math class built into java. It's important to import it since it provides the constant PI which is used in our volume calculation formula.

import java.lang.Math;

Step 3: Implement the Volume Calculation Formula

Using the volume formula of a sphere (4/3)πr³, implement it in the calculateVolume method.

public double calculateVolume(double radius) {
    return (4/3) * Math.PI * Math.pow(radius, 3);
}

Step 4: Validate the Input

Before doing the calculation, it's a good practice to validate the input. For the radius of the sphere, it must be a positive number. If it's not, our method should return a specific value indicating an error.

public double calculateVolume(double radius) {
    if(radius < 0) {
        return -1;
    }
    return (4/3) * Math.PI * Math.pow(radius, 3);
}

Step 5: Test the Function

Finally, let's create a main method to test our function.

public static void main(String[] args) {
    SphereVolumeCalculator svc = new SphereVolumeCalculator();
    System.out.println(svc.calculateVolume(5));
}

Conclusion

In Java, we can create a class to define a method for calculating the volume of a sphere. The Math class provided by Java helps us a lot by providing mathematical constants and functions. Also, don't forget to validate your input before starting your calculations.