src/java.desktop/share/classes/javax/swing/text/WrappedPlainView.java

@@ -362,11 +362,12 @@
             p = p0 + Utilities.getBreakLocation(segment, metrics,
                                                 tabBase, tabBase + currentWidth,
                                                 this, p0);
         } else {
             p = p0 + Utilities.getTabbedTextOffset(segment, metrics,
-                                                   tabBase, tabBase + currentWidth,
+                                                   (float)tabBase, 
+                                                   (float)(tabBase + currentWidth),
                                                    this, p0, false);
         }
         SegmentCache.releaseSharedSegment(segment);
         return p;
     }

@@ -845,12 +846,12 @@
                     } else {
                         // Determine the offset into the text
                         Segment segment = SegmentCache.getSharedSegment();
                         loadText(segment, p0, p1);
                         int n = Utilities.getTabbedTextOffset(segment, metrics,
-                                                   alloc.x, x,
-                                                   WrappedPlainView.this, p0);
+                                                   (float)alloc.x, (float)x,
+                                                   WrappedPlainView.this, p0, true);
                         SegmentCache.releaseSharedSegment(segment);
                         return Math.min(p0 + n, p1 - 1);
                     }
                 }
             }