createQuery(qlString, resultClass) - JPA EntityManager's method

TypedQuery<T> createQuery(
  String qlString,
  Class<T> resultClass

Create an instance of TypedQuery for executing a Java Persistence query language statement. The select list of the query must contain only a single item, which must be assignable to the type specified by the resultClass argument.
qlString - a Java Persistence query string
resultClass - the type of the query result
the new query instance
IllegalArgumentException - if the query string is found to be invalid or if the query result is found to not be assignable to the specified type
JPA 2.0

This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
ObjectDB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.