急问banq;长整形的问题

我的数据库是oracle，其中一个实体bean是khxx（客户信息），主键是id，
id的字段 number(20).
生成的实体bean中主键类是id：
ejb-jar.xml:
<description>Entity Bean ( CMP )</description>
<display-name>Khxx</display-name>
<ejb-name>Khxx</ejb-name>
<home>daben.KhxxHome</home>
<remote>daben.Khxx</remote>
<ejb-class>daben.impl.KhxxBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Long</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>Khxx</abstract-schema-name>
<cmp-field>
<field-name>id</field-name>
</cmp-field>
<cmp-field>
<field-name>khmc</field-name>
</cmp-field>
<cmp-field>
<field-name>khjm</field-name>
</cmp-field>
<cmp-field>
<field-name>khlxr</field-name>
</cmp-field>
<cmp-field>
<field-name>khdz</field-name>
</cmp-field>
<cmp-field>
<field-name>sfhd</field-name>
</cmp-field>
<cmp-field>
<field-name>jsfs</field-name>
</cmp-field>
<cmp-field>
<field-name>jshb</field-name>
</cmp-field>
<cmp-field>
<field-name>chsh</field-name>
</cmp-field>
<cmp-field>
<field-name>dzyj</field-name>
</cmp-field>
<cmp-field>
<field-name>dh</field-name>
</cmp-field>
<cmp-field>
<field-name>yhzh</field-name>
</cmp-field>
<primkey-field>id</primkey-field>
怎么在测试的时候，khxx=khxxHome.findByPrimaryKey(1);
总提示；Error(53,15): method findByPrimaryKey(int) not found in interface daben.KhxxHome
难道int和long还有什么不同？
khxx = khxxHome.create(1,"武汉红进龙","daben","","","","","","","",10000000,10000000);也是提示int的问题。
而在oracle中是可以插入的。
谢谢