--- a/jdk/src/share/classes/javax/swing/plaf/basic/BasicScrollPaneUI.java	Mon Oct 25 18:25:47 2010 +0400
+++ b/jdk/src/share/classes/javax/swing/plaf/basic/BasicScrollPaneUI.java	Mon Oct 25 19:24:50 2010 +0400
@@ -362,6 +362,14 @@
      * @since 1.6
      */
     public int getBaseline(JComponent c, int width, int height) {
+        if (c == null) {
+            throw new NullPointerException("Component must be non-null");
+        }
+
+        if (width < 0 || height < 0) {
+            throw new IllegalArgumentException("Width and height must be >= 0");
+        }
+
         JViewport viewport = scrollpane.getViewport();
         Insets spInsets = scrollpane.getInsets();
         int y = spInsets.top;

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/swing/plaf/basic/BasicScrollPaneUI/Test6632810.java	Mon Oct 25 19:24:50 2010 +0400
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 6632810
+ * @summary javax.swing.plaf.basic.BasicScrollPaneUI.getBaseline(JComponent, int, int) doesn't throw NPE and IAE
+ * @author Pavel Porvatov
+ */
+
+import javax.swing.*;
+import javax.swing.plaf.basic.BasicScrollPaneUI;
+
+public class Test6632810 {
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(new Runnable() {
+            public void run() {
+                BasicScrollPaneUI ui = new BasicScrollPaneUI();
+
+                ui.installUI(new JScrollPane());
+
+                try {
+                    ui.getBaseline(null, 1, 1);
+
+                    throw new RuntimeException("getBaseline(null, 1, 1) does not throw NPE");
+                } catch (NullPointerException e) {
+                    // Ok
+                }
+
+                int[][] illegelParams = new int[][]{
+                        {-1, 1,},
+                        {1, -1,},
+                        {-1, -1,},
+                };
+
+                for (int[] illegelParam : illegelParams) {
+                    try {
+                        int width = illegelParam[0];
+                        int height = illegelParam[1];
+
+                        ui.getBaseline(new JScrollPane(), width, height);
+
+                        throw new RuntimeException("getBaseline(new JScrollPane(), " + width + ", " + height +
+                                ") does not throw IAE");
+                    } catch (IllegalArgumentException e) {
+                        // Ok
+                    }
+                }
+            }
+        });
+    }
+}