Differences between JDBC and JDBC-ODBC data sources connecting to databases in JAVA

I used jdbc to connect to the database before writing the program. Suddenly I learned how to connect to the database using odbc. I found that there is a difference between the two.

JDBCClass. forName ("database driver name"); // such as com. microsoft. jdbc. sqlserver. string url = "jdbc: microsoft: sqlserver: // localhost: 1433; DatabaseName = database name"; java. SQL. connection conn = java. SQL. driverManager. getConnection (url, "username", "password"); JDBC-ODBC bridge (Data Source) Class. forName ("sun. jdbc. odbc. jdbcodbcDriver "); String url =" jdbc: odbc; Data Source Name "; java. SQL. connection conn = java. SQL. driverManager. getConnection (url, "User Name", "password ");