Index: src/java/org/apache/commons/math/linear/AbstractRealMatrix.java
===================================================================
--- src/java/org/apache/commons/math/linear/AbstractRealMatrix.java	(revision 726076)
+++ src/java/org/apache/commons/math/linear/AbstractRealMatrix.java	(working copy)
@@ -767,7 +767,9 @@
         final int nRows = getRowDimension();
         final int nCols = getColumnDimension();
         final StringBuffer res = new StringBuffer();
-        res.append("RealMatrixImpl{");
+        String fullClassName = getClass().getName();
+        String shortClassName = fullClassName.substring(fullClassName.lastIndexOf('.') + 1);
+        res.append(shortClassName).append("{");
 
         for (int i = 0; i < nRows; ++i) {
             if (i > 0) {
@@ -844,7 +846,7 @@
      * @param row row index to check
      * @exception MatrixIndexException if index is not valid
      */
-    private void checkRowIndex(final int row) {
+    protected void checkRowIndex(final int row) {
         if (row < 0 || row >= getRowDimension()) {
             throw new MatrixIndexException("row index {0} out of allowed range [{1}, {2}]",
                                            new Object[] { row, 0, getRowDimension() - 1});
@@ -856,7 +858,7 @@
      * @param column column index to check
      * @exception MatrixIndexException if index is not valid
      */
-    private void checkColumnIndex(final int column)
+    protected void checkColumnIndex(final int column)
         throws MatrixIndexException {
         if (column < 0 || column >= getColumnDimension()) {
             throw new MatrixIndexException("column index {0} out of allowed range [{1}, {2}]",