java.lang.UnsupportedOperationException: The application must supply JDBC connections.

Exception in thread "main" java.lang.UnsupportedOperationException: The application must supply JDBC connections.

Problem:   

while setting jdbc connection property by using annotation configuration we need to add hibernate in preceed of property.

AnnotationConfiguration config = new AnnotationConfiguration().addAnnotatedClass(User.class);

       config.setProperty("connection.driver_class", "oracle.jdbc.driver.OracleDriver");

       config.setProperty("connection.url", "jdbc:oracle:thin:@localhost:1521:xe");

       config.setProperty("connection.username", "ranga");

       config.setProperty("connection.password", "ranga");

Solution:

AnnotationConfiguration config = new AnnotationConfiguration().addAnnotatedClass(User.class);

       config.setProperty("hibernate.connection.driver_class", "oracle.jdbc.driver.OracleDriver");

       config.setProperty("hibernate.connection.url", "jdbc:oracle:thin:@localhost:1521:xe");

       config.setProperty("hibernate.connection.username", "ranga");

       config.setProperty("hibernate.connection.password", "ranga");