javabean的属性编辑器在netbeans中为什么不显示呢？

[hopegood]

//本代码的作用：想在netbeans中，给titlePosition属性显示自己的属性编辑器，按道理，应该有个下拉框
//可是，没有显示
//以下是代码
package javaBeantest;

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;
import java.awt.font.FontRenderContext;

import java.awt.geom.*;
import java.beans.PropertyDescriptor;
import java.beans.PropertyEditorSupport;
import java.beans.*;
public class ChartBean extends JPanel{

public void setTitlePosition(int p){
this.titlePosition = p;
}

public int getTitlePosition(){
return this.titlePosition;
}

private static final int LEFT = 0;
private static final int CENTER = 1;
private static final int RIGHT = 2;

private static final int XPREFSIZE = 300;
private static final int YPREFSIZE = 300;

private double[] values = {1,2,3};
private String title = "Title";
private int titlePosition = CENTER;
private boolean inverse;
private Color color = Color.red;
}

//一些属性编辑器

class TitlePositionEditor extends PropertyEditorSupport{

public String[] getTags(){
return options;
}
private String[] options = {"Left","Center","Right"};

@Override public String getJavaInitializationString(){
return "" + getValue();
}

public String getAsText(){
int value = (Integer)getValue();
return options[value];

}
public void setAsText(String s){
for (int i = 0; i < options.length; i++){
if (options[i].equals(s)){
setValue(i);
return;
}
}
}

}

class ChartBeanBeanInfo extends SimpleBeanInfo{

@Override public PropertyDescriptor[] getPropertyDescriptors(){
try
{
PropertyDescriptor titlePositionDescriptor =
new PropertyDescriptor("titlePosition", ChartBean.class);
titlePositionDescriptor.setPropertyEditorClass(TitlePositionEditor.class);

/*PropertyDescriptor valuesDescriptor =
new PropertyDescriptor("values",ChartBean.class);
valuesDescriptor.setPropertyEditorClass(DoubleArrayEditor.class);*/


return new PropertyDescriptor[]{
titlePositionDescriptor//,
//valuesDescriptor
};
}
catch(IntrospectionException e){
e.printStackTrace();
return null;
}
}

[Brunhild]

lz的意思是自动生成get,set方法吗?
如果是这样的话,可以试试alt+insert