why this.getHibernateTemplate().find show error result

[EdwardKing]

I have two table,table A and table B,
table A

ID     NAME 
--------------- 
test   John 
tiger  Kate

table B

ID  USERID  DESCRIPTION 
----------------------- 
b1  test     this is a test 
b1  tiger    this is a tiger 
b2  abc      this is a abc

A.hbm.xml

<class name="AModel" table="A"> 
  <id name="id" column="id" type="java.lang.String">    
    <generator class="assigned"/> 
  </id> 
  <property name="uname" type="java.lang.String"> 
    <column name="name" length="18" not-null="true" /> 
  </property> 
</class>

B.hbm.xml

<class name="BModel" table="B"> 
  <id name="id" column="id" type="java.lang.String">    
    <generator class="assigned"/> 
  </id> 
  <property name="uid" type="java.lang.String"> 
    <column name="userid" length="100" not-null="false" /> 
  </property> 
  <property name="g" type="java.lang.String"> 
    <column name="description" length="100" not-null="false" /> 
  </property> 
</class>

AModel.java

public class AModel{ 
 private String id; 
 private String uname; 
 .... 
}

BModel.java

public class BModel{ 
 private String id; 
 private String uid; 
 private String g; 
 .... 
}

Then I execute following statement:

List info=this.getHibernateTemplate().find("from AModel a,BModel b where b.uid=a.id and b.id=?",'b1'); 
AModel a; 
BModel b; 
if(info.size()>0){ 
for(int i=0;i<info.size();i++){ 
 Object[] obj=(Object[])info.get(i); 
 for(int j=0;j<obj.length;j++){ 
 (obj[j] instanceof BModel){ 
  b=(BModel)obj[j]; 
  System.out.print(b.getUid()); 
  System.out.print(b.getG()); 
 } 
 if(obj[j] instanceof AModel){ 
  a=(AModel)obj[j]; 
  System.out.println(a.getUname()); 
 } 
 System.out.println(""); 
}

It should print following result:

test   John   this is a test 
tiger  Kate   this is a tiger

above result is the result which I wish to get! But it prints following error result:

test   Kate   this is a tiger 
tiger  Kate   this is a tiger

I don't know why it show correct result? I am puzzled it for several days! Anyone could point out where wrong with me?
How to get correct my code to get correct result:

test   John   this is a test 
tiger  Kate   this is a tiger

Thanks!

[TerpInMD]

Id has to be unique but in your table B it is not. You need to either make it unique or use <composite-id>.

Also your mappings are not very (any) object oriented. You could for example create an instance of POJO A in your POJO Object B then map them with <one-one> or <many-one>.