diff --git a/designer-chart/src/main/java/com/fr/van/chart/designer/type/AbstractVanChartTypePane.java b/designer-chart/src/main/java/com/fr/van/chart/designer/type/AbstractVanChartTypePane.java
index ead6be3395..68995a554e 100644
--- a/designer-chart/src/main/java/com/fr/van/chart/designer/type/AbstractVanChartTypePane.java
+++ b/designer-chart/src/main/java/com/fr/van/chart/designer/type/AbstractVanChartTypePane.java
@@ -29,9 +29,9 @@ public abstract class AbstractVanChartTypePane extends AbstractChartTypePane{
     private static final long serialVersionUID = 7743244512351499265L;
     private UICheckBox largeModelCheckBox;
 
-    private Boolean samePlot;
+    private boolean samePlot;
 
-    protected Boolean isSamePlot() {
+    protected boolean isSamePlot() {
         return samePlot;
     }