class Sphere { int radius = 0; double xCenter; double yCenter; double zCenter; Sphere() { radius = 1; } Sphere(double x, double y, double z) { this(); xCenter = x; yCenter = y; zCenter = z; } Sphere(int theRadius, double x, double y, double z) { this(x, y, z); radius = theRadius; } // Create a sphere from an existing object Sphere(final Sphere oldSphere) { radius = oldSphere.radius; xCenter = oldSphere.xCenter; yCenter = oldSphere.yCenter; zCenter = oldSphere.yCenter; } }