src/java.desktop/share/classes/javax/swing/ListSelectionModel.java

*** 330,335 ****
--- 330,392 ----
       *
       * @param x the ListSelectionListener
       * @see #addListSelectionListener
       */
      void removeListSelectionListener(ListSelectionListener x);
+ 
+     /**
+      * Returns an array of all of the selected indices in the selection model,
+      * in increasing order.
+      *
+      * @return all of the selected indices, in increasing order,
+      *         or an empty array if nothing is selected
+      * @see #removeSelectionInterval
+      * @see #addListSelectionListener
+      * @since 11
+      * @implSpec The default implementation iterates from minimum selected
+      * index {@link #getMinSelectionIndex()} to maximum selected index {@link
+      * #getMaxSelectionIndex()} and returns the selected indices {@link
+      * #isSelectedIndex(int)} in a newly allocated int array.
+      */
+     default int[] getSelectedIndices() {
+         int iMin = getMinSelectionIndex();
+         int iMax = getMaxSelectionIndex();
+ 
+         if ((iMin < 0) || (iMax < 0)) {
+             return new int[0];
+         }
+ 
+         int[] rvTmp = new int[1+ (iMax - iMin)];
+         int n = 0;
+         for(int i = iMin; i <= iMax; i++) {
+             if (isSelectedIndex(i)) {
+                 rvTmp[n++] = i;
+             }
+         }
+         int[] rv = new int[n];
+         System.arraycopy(rvTmp, 0, rv, 0, n);
+         return rv;
+     }
+ 
+     /**
+      * Returns the number of selected items.
+      *
+      * @return the number of selected items, 0 if no items are selected
+      * @since 11
+      * @implSpec The default implementation iterates from minimum selected
+      * index {@link #getMinSelectionIndex()} to maximum selected index {@link
+      * #getMaxSelectionIndex()} and returns the number of selected indices
+      * {@link #isSelectedIndex(int)}
+      */
+     default int getSelectedItemsCount() {
+         int iMin = getMinSelectionIndex();
+         int iMax = getMaxSelectionIndex();
+         int count = 0;
+ 
+         for(int i = iMin; i <= iMax; i++) {
+             if (isSelectedIndex(i)) {
+                 count++;
+             }
+         }
+         return count;
+     }
  }