Name: dfC67450 Date: 04/24/98



java.text.MessageFormat.setFormat(int n, Format format) throws unexpected
ArrayIndexOutOfBoundsException when n is invalid (n < 0). Javadoc says
nothing about this behavior.
Here is the test demonstrating the bug:

-----------------Test.java------------------------
import java.text.*;
public class Test {
    public static void main (String args[]){
      MessageFormat mf = new MessageFormat("arg: {0}");
      try {
        mf.setFormat(-1, NumberFormat.getInstance());
      } catch (IllegalArgumentException e) {
        System.out.println("Test passed");
      } catch (ArrayIndexOutOfBoundsException e) {
        System.out.println("Test failed. It throws " + e);
      }
    }

}

---------Output from the test---------------------
Test failed. It throws java.lang.ArrayIndexOutOfBoundsException: -1
--------------------------------------------------

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