NegativeArraySizeException occurs, when you declare an array of negative size.

Example

public class CloneException implements Cloneable {

  int num;
  Integer[] numarray;

  CloneException(int numelements) {
  num = numelements;
  numarray = new Integer[num];
  }
  public Object clone() {
  try {
  return super.clone();
  } catch (CloneNotSupportedException e) {
  throw new Error("Exception in the Clone");
  }
  }
  public static void main(String[] args) {
  CloneException ex = new CloneException(-1);
  CloneException copy = (CloneException) ex.clone();

  ex.numarray[0] = new Integer(1);

  System.out.println("numarray[0] = " + ex.numarray[0]);
  System.out.println("numarray[0] = " + copy.numarray[0]);
  }
}