javax.jdo.JDOUserException: Persistent class "ChatUsers" has no table in the database

I am doing retrieving data from h2 database. my problem is in q.setClass(). here I am trying to set the table chatUsers.class, the database has the same class But this is showing that there are no Table ChatUsers. So what can I do for that??

If i do not write q.setClass(). then it is giving data but there problem is that then i could not able to get the List of that class.

ChatUser class

import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
import javax.jdo.Query;
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
import java.util.List;
import java.util.Properties;

@PersistenceCapable(detachable="true")
public class ChatUsers {

    @PrimaryKey
    @Persistent(valueStrategy = IdGeneratorStrategy.INCREMENT)
    int id;
    String user;
    String mobileNo;
    String email;
    String password;

    public ChatUsers(String user, String password, String mobileNo, String email) {
        this.user = user;
        this.mobileNo = mobileNo;
        this.email = email;
        this.password = password;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUser() {
        return user;
    }

    public void setUser(String user) {
        this.user = user;
    }

    public String getMobileNo() {
        return mobileNo;
    }

    public void setMobileNo(String mobileNo) {
        this.mobileNo = mobileNo;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }
}

Retrieving Logic

public static List<ChatUsers> getAllUsersList() {
        PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(setProperties());
        PersistenceManager pm = pmf.getPersistenceManager();
        List<ChatUsers> chatUsersList = null;
        pm.currentTransaction().begin();
        try {
            Query q = pm.newQuery("javax.jdo.query.SQL","SELECT * FROM `CHATUSERS`");
            q.setClass(ChatUsers.class);//This line has error
             chatUsersList = (List<ChatUsers>) q.execute();
        }catch (Exception ex)
        {
            System.out.println(ex);
        }

        return chatUsersList;
    }

Error code

javax.jdo.JDOUserException: Persistent class "ChatUsers" has no table in the database, but the operation requires it. Please check the specification of the MetaData for this class.
NestedThrowables:
org.datanucleus.store.rdbms.exceptions.NoTableManagedException: Persistent class "ChatUsers" has no table in the database, but the operation requires it. Please check the specification of the MetaData for this class.

When you execute() the query, you should use the executeList() instead. [1]

A different solution could be using setResultClass() instead of setClass(). [1]

An example for the first solution would be:

    Query query = pm.newQuery("javax.jdo.query.SQL", "SELECT MY_ID, MY_NAME FROM MYTABLE");
query.setClass(MyClass.class);
List<MyClass> results = query.executeList();

[1] Search for "Setting candidate class " and "Defining a result type " in the documentation URL: http://www.datanucleus.org/products/accessplatform/jdo/query.html