Accessing user_tables and user_tab_columns of oracle from java

hi, i can not access "user_tables" and "user_tab_columns" from java code while i can access them from TOAD.I connect to the database "HR", which is a sample database of oracle, as "normal".When i write:
@Entity
@Table(name="user_tab_columns")
public class USER_TAB_COLUMNS{
}it gives an error that user_tab_columns could not be found on the database.What can i do to access these tables from code?

I think you have posted your question in the wrong forum. Try the [JDBC forum|http://forums.sun.com/forum.jspa?forumID=48].

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Accessing user_tables and user_tab_columns of oracle from java

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