src/java.desktop/share/classes/javax/swing/text/GlyphPainter1.java

@@ -57,11 +57,15 @@
     public float getSpan(GlyphView v, int p0, int p1,
                          TabExpander e, float x) {
         sync(v);
         Segment text = v.getText(p0, p1);
         int[] justificationData = getJustificationData(v);
-        int width = Utilities.getTabbedTextWidth(v, text, metrics, (int) x, e, p0,
+        
+        Component comp = v.getContainer();                
+        FontMetrics metrics1 = comp.getFontMetrics(comp.getFont());
+        
+        float width = Utilities.getTabbedTextWidth(v, text, metrics1, x, e, p0,
                                                  justificationData);
         SegmentCache.releaseSharedSegment(text);
         return width;
     }