Need of Class.forName() to load a driver
Class.forName("org.gjt.mm.mysql.Driver");
Connection con = DriverManager.getConnection(url, "myLogin", "myPassword");
Connection con = DriverManager.getConnection(url, "myLogin", "myPassword");
All JDBC Drivers have a static
block that registers itself with DriverManager and DriverManager has
static an initializer only.
The MySQL JDBC Driver has a static
initializer looks like this:
static {
try {
java.sql.DriverManager.registerDriver(new Driver());
} catch (SQLException E) {
throw new RuntimeException("Can't register driver!");
}
}
try {
java.sql.DriverManager.registerDriver(new Driver());
} catch (SQLException E) {
throw new RuntimeException("Can't register driver!");
}
}
JVM executes
the static block and the Driver registers itself with the DriverManager.
We need a database connection to manipulate the database and create the
connection to the database, the DriverManager class has to
know which database driver you want to use (static initialized).
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