Question

Hey Guys, I’ve got the following float array…

         public static float camObjCoord[] = new float[] {



             -2.0f, -1.5f,  -6.0f,
              2.0f, -1.5f,  -6.0f,
             -2.0f,  1.5f,  -6.0f,
              2.0f,  1.5f,  -6.0f,

             -2.0f, -1.5f, -10.0f,
             -2.0f,  1.5f, -10.0f,
              2.0f, -1.5f, -10.0f,
              2.0f,  1.5f, -10.0f,

             -2.0f, -1.5f,  -6.0f,
             -2.0f,  1.5f,  -6.0f,
             -2.0f, -1.5f, -10.0f,
             -2.0f,  1.5f, -10.0f,

              2.0f, -1.5f, -10.0f,
              2.0f,  1.5f, -10.0f,
              2.0f, -1.5f,  -6.0f,
              2.0f,  1.5f,  -6.0f,

             -2.0f,  1.5f,  -6.0f,
              2.0f,  1.5f, -6.0f,
             -2.0f,  1.5f, -6.0f,
              2.0f,  1.5f, -10.0f,

             -2.0f, -1.5f,  -6.0f,
             -2.0f, -1.5f, -10.0f,
              2.0f, -1.5f,  -6.0f,
              2.0f, -1.5f, -10.0f,



                 -2.0f,  2.5f,  -6.0f,
                  2.0f,  2.5f,  -6.0f,
                 -2.0f,  4.5f,  -6.0f,
                  2.0f,  4.5f,  -6.0f,

                 -2.0f,  2.5f, -10.0f,
                 -2.0f,  4.5f, -10.0f,
                  2.0f,  2.5f, -10.0f,
                  2.0f,  4.5f, -10.0f,

                 -2.0f,  2.5f,  -6.0f,
                 -2.0f,  4.5f,  -6.0f,
                 -2.0f,  2.5f, -10.0f,
                 -2.0f,  4.5f, -10.0f,
                                      2.0f,  2.5f, -10.0f,
                  2.0f,  4.5f, -10.0f,
                  2.0f,  2.5f,  -6.0f,
                  2.0f,  4.5f,  -6.0f,

                 -2.0f,  4.5f,  -6.0f,
                  2.0f,  4.5f, -6.0f,
                 -2.0f,  4.5f, -6.0f,
                  2.0f,  4.5f, -10.0f,

                 -2.0f,  2.5f,  -6.0f,
                 -2.0f,  2.5f, -10.0f,
                  2.0f,  2.5f,  -6.0f,
                  2.0f,  2.5f, -10.0f,
        };

I’ve got a method after it which I would like to add values to the end of the array but it’s telling me it can’t find camObjCoord, any idea why?

Answer 1

Some important points:

• Arrays in Java are fixed-length objects. You can’t modify the length of an array once it’s created.
  • You can create another array of size N+1, copying all N elements, and then adding the extra element, but this is a costly highly-inefficient O(N) operation to add a single element
• Based on the name, formatting and the pattern in the numbers, it looks like every 3 float is a 3D point. You should seriously considering defining a Point3D custom type to hold your data.
• Effective Java 2nd Edition, Prefer lists to arrays; you should consider having a List<Point3d>
• Unless you have a good reason to use float, you should use double instead