Java: getting a value from an array from a defined location

Question

I have an array of numbers and would like to retrieve one of the values from location \"index\". I\'ve looked at the Java documentation http://java.sun.com/j2se/1.5.0/docs/a

Answer 1

In Java, array indexes are denoted by the square brackets. You can replace your get(vertices, index) call like so:

  vertex = vertices[index];

In looking at your code, it appears you are coming from a language that defines a global get() function for such operations. Be aware that, in Java, there are no global functions. Each class you create defines its own functions, and any function call without an object or class preceding it is assumed to be defined in the local class.

So, your call to get(Point[], int) could work only if you define that function on this class:

  public Point get(Point[] vertices, int index) {
     return vertices[index];
  }

Or define it statically on another class and precede the call with the class name:

public class PointArrayHelper {

  public static Point get(Point[] vertices, int index) {
    return vertices[index];
  }
}

PointArrayHelper.get(vertices, index);

Now, be warned that I don't think you should do either of these! I just thought it might help you understand Java a little better.