label = PreferencesMessages
                                .getString("JavaEditorPreferencePage.wrapStringsSQ");//$NON-NLS-1$
-               addCheckBox(group, label, PreferenceConstants.EDITOR_WRAP_STRINGS_SQ, 1);
+               button = addCheckBox(group, label,
+                               PreferenceConstants.EDITOR_WRAP_STRINGS_SQ, 1);
 
                label = PreferencesMessages
                                .getString("JavaEditorPreferencePage.escapeStringsSQ");
                fTextFields.put(textControl, key);
                if (isNumber) {
                        fNumberFields.add(textControl);
+                       textControl.setText("0");
                        textControl.addModifyListener(fNumberFieldListener);
                } else {
                        textControl.addModifyListener(fTextFieldListener);