修改pmd问题

designer_base/src/com/fr/design/editor/editor/ColumnSelectedEditor.java

@@ -37,7 +37,9 @@ public class ColumnSelectedEditor extends Editor<SimpleDSColumn> {
 			@Override
 			public void itemStateChanged(ItemEvent e) {
 				TableDataWrapper tableDataWrapper = tableDataComboBox.getSelectedItem();
-				if (tableDataWrapper != null) {
+				if (tableDataWrapper == null) {
+					return;
+				}
 				//这边需要重新初始化columnNames, 否则nameList长度和columnNames长度不同导致出錯。
 				List<String> nameList = tableDataComboBox.getSelectedItem().calculateColumnNameList();
 				columnNames = new String[nameList.size()];
@@ -48,7 +50,6 @@ public class ColumnSelectedEditor extends Editor<SimpleDSColumn> {
 				}
 				columnNameComboBox.validate();
 			}
-			}
 		});
 		columnNameComboBox = new UIComboBox();
 		tableDataComboBox.setPreferredSize(new Dimension(82, 20));