Java Code:
class Weeble {
} // A small mythical creature

public class ArraySize {

  public static void main(String[] args) {
    // Arrays of objects:
    Weeble[] a; // Local uninitialized variable
    Weeble[] b = new Weeble[5]; // Null references
    Weeble[] c = new Weeble[4];
    for (int i = 0; i < c.length; i++)
      if (c[i] == null) // Can test for null reference
        c[i] = new Weeble();
    // Aggregate initialization:
    Weeble[] d = { new Weeble(), new Weeble(), new Weeble() };
    // Dynamic aggregate initialization:
    a = new Weeble[] { new Weeble(), new Weeble() };
    System.out.println("a.length=" + a.length);
    System.out.println("b.length = " + b.length);
    // The references inside the array are
    // automatically initialized to null:
    for (int i = 0; i < b.length; i++)
      System.out.println("b[" + i + "]=" + b[i]);
    System.out.println("c.length = " + c.length);
    System.out.println("d.length = " + d.length);
    a = d;
    System.out.println("a.length = " + a.length);

    // Arrays of primitives:
    int[] e; // Null reference
    int[] f = new int[5];
    int[] g = new int[4];
    for (int i = 0; i < g.length; i++)
      g[i] = i * i;
    int[] h = { 11, 47, 93 };
    // Compile error: variable e not initialized:
    //!System.out.println("e.length=" + e.length);
    System.out.println("f.length = " + f.length);
    // The primitives inside the array are
    // automatically initialized to zero:
    for (int i = 0; i < f.length; i++)
      System.out.println("f[" + i + "]=" + f[i]);
    System.out.println("g.length = " + g.length);
    System.out.println("h.length = " + h.length);
    e = h;
    System.out.println("e.length = " + e.length);
    e = new int[] { 1, 2 };
    System.out.println("e.length = " + e.length);

  }
}