Re: Strange JTable issue in Sun's Java code

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From	Jeff Higgins <jeff@invalid.invalid>
Newsgroups	comp.lang.java.gui
Subject	Re: Strange JTable issue in Sun's Java code
Date	Mon, 16 Jan 2012 17:57:55 -0500
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I get:
java.lang.NegativeArraySizeException
	at NullTest.removeEntries(NullTest.java:43)
when I run this.
Maybe another precondition needs checking.


public class Test {

   private static int[] a = {};


   public static void main(String[] args) {

     try {
       removeEntries(0,3);
     } catch (Exception e) {
       e.printStackTrace();
     }

   }

   private static int[] getSizes() {
     return new int[]{1,2,3,4,5};
   }

   /**
    * Removes a contiguous group of entries
    * from this <code>SizeSequence</code>.
    * Note that the values of <code>start</code> and
    * <code>length</code> must satisfy the following
    * conditions:  <code>(0 <= start < getSizes().length)
    * AND (length >= 0)</code>.  If these conditions are
    * not met, the behavior is unspecified and an exception
    * may be thrown.
    *
    * @param start   the index of the first entry to be removed
    * @param length  the number of entries to be removed
    */
   public static void removeEntries(int start, int length) {
     assert getSizes() != null;
     assert 0 <= start;
     assert start < getSizes().length;
     assert length >= 0;
     assert a != null;
     int sizes[] = getSizes();
     //int end = start + length;
     int n = a.length - length;
     a = new int[n];
     for (int i = 0; i < start; i++) {
         a[i] = sizes[i] ;
     }
     for (int i = start; i < n; i++) {
         a[i] = sizes[i+length] ;
     }
     //setSizes(a);
}

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Thread

Strange JTable issue in Sun's Java code Novice <novice@example..com> - 2012-01-16 18:34 +0000
  Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-16 14:48 -0500
    Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-16 14:55 -0500
    Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-16 15:19 -0500
      Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-16 15:31 -0500
        Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-16 17:57 -0500
    Re: Strange JTable issue in Sun's Java code Novice <novice@example..com> - 2012-01-17 01:48 +0000
      Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-17 03:22 -0500
        Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-17 03:29 -0500
        Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-17 03:49 -0500
        Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-17 03:55 -0500
        Re: Strange JTable issue in Sun's Java code Novice <novice@example..com> - 2012-01-17 22:21 +0000
          Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-17 18:18 -0500
            Re: Strange JTable issue in Sun's Java code Jeff Higgins <jeff@invalid.invalid> - 2012-01-17 20:56 -0500
              Re: Strange JTable issue in Sun's Java code Novice <novice@example..com> - 2012-01-18 05:24 +0000
                Re: Strange JTable issue in Sun's Java code Novice <novice@example..com> - 2012-01-18 17:40 +0000
            Re: Strange JTable issue in Sun's Java code Novice <novice@example..com> - 2012-01-18 05:37 +0000
  Re: Strange JTable issue in Sun's Java code Christian Kaufhold <chka@ucuri.chka.de> - 2012-01-19 21:00 +0100

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