Added in API level 1

Summary: Methods | Inherited Methods

DriverManager

public class DriverManager
extends Object

java.lang.Object
↳	java.sql.DriverManager

The basic service for managing a set of JDBC drivers.
NOTE: The DataSource interface, new in the JDBC 2.0 API, provides another way to connect to a data source. The use of a DataSource object is the preferred means of connecting to a data source.

As part of its initialization, the DriverManager class will attempt to load the driver classes referenced in the "jdbc.drivers" system property. This allows a user to customize the JDBC Drivers used by their applications. For example in your ~/.hotjava/properties file you might specify:

 jdbc.drivers=foo.bah.Driver:wombat.sql.Driver:bad.taste.ourDriver

The DriverManager methods getConnection and getDrivers have been enhanced to support the Java Standard Edition Service Provider mechanism. JDBC 4.0 Drivers must include the file META-INF/services/java.sql.Driver. This file contains the name of the JDBC drivers implementation of java.sql.Driver. For example, to load the my.sql.Driver class, the META-INF/services/java.sql.Driver file would contain the entry:

 my.sql.Driver

Applications no longer need to explictly load JDBC drivers using Class.forName(). Existing programs which currently load JDBC drivers using Class.forName() will continue to work without modification.

When the method getConnection is called, the DriverManager will attempt to locate a suitable driver from amongst those loaded at initialization and those loaded explicitly using the same classloader as the current applet or application.

Starting with the Java 2 SDK, Standard Edition, version 1.3, a logging stream can be set only if the proper permission has been granted. Normally this will be done with the tool PolicyTool, which can be used to grant permission java.sql.SQLPermission "setLog".

See also:

Driver
Connection

Summary

Public methods
`static void`	`deregisterDriver(Driver driver)` Drops a driver from the `DriverManager`'s list.
`static Connection`	`getConnection(String url)` Attempts to establish a connection to the given database URL.
`static Connection`	`getConnection(String url, String user, String password)` Attempts to establish a connection to the given database URL.
`static Connection`	`getConnection(String url, Properties info)` Attempts to establish a connection to the given database URL.
`static Driver`	`getDriver(String url)` Attempts to locate a driver that understands the given URL.
`static Enumeration<Driver>`	`getDrivers()` Retrieves an Enumeration with all of the currently loaded JDBC drivers to which the current caller has access.
`static PrintStream`	`getLogStream()` This method was deprecated in API level 15. Use `getLogWriter` instead.
`static PrintWriter`	`getLogWriter()` Retrieves the log writer.
`static int`	`getLoginTimeout()` Gets the maximum time in seconds that a driver can wait when attempting to log in to a database.
`static void`	`println(String message)` Prints a message to the current JDBC log stream.
`static void`	`registerDriver(Driver driver)` Registers the given driver with the `DriverManager`.
`static void`	`setLogStream(PrintStream out)` This method was deprecated in API level 15. Use `setLogWriter` instead.
`static void`	`setLogWriter(PrintWriter out)` Sets the logging/tracing `PrintWriter` object that is used by the `DriverManager` and all drivers.
`static void`	`setLoginTimeout(int seconds)` Sets the maximum time in seconds that a driver will wait while attempting to connect to a database.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public methods

deregisterDriver

Added in API level 1

public static void deregisterDriver (Driver driver)

Drops a driver from the DriverManager's list. Applets can only deregister drivers from their own classloaders.

Parameters
`driver`	`Driver`: the JDBC Driver to drop

Throws
`SQLException`	if a database access error occurs

getConnection

Added in API level 1

public static Connection getConnection (String url)

Attempts to establish a connection to the given database URL. The DriverManager attempts to select an appropriate driver from the set of registered JDBC drivers.

Parameters
`url`	`String`: a database url of the form `jdbc:subprotocol:subname`

Returns
`Connection`	a connection to the URL

Throws
`SQLException`	if a database access error occurs

getConnection

Added in API level 1

public static Connection getConnection (String url, 
                String user, 
                String password)

Attempts to establish a connection to the given database URL. The DriverManager attempts to select an appropriate driver from the set of registered JDBC drivers.

Parameters
`url`	`String`: a database url of the form `jdbc:subprotocol:subname`
`user`	`String`: the database user on whose behalf the connection is being made
`password`	`String`: the user's password

Returns
`Connection`	a connection to the URL

Throws
`SQLException`	if a database access error occurs

getConnection

Added in API level 1

public static Connection getConnection (String url, 
                Properties info)

Attempts to establish a connection to the given database URL. The DriverManager attempts to select an appropriate driver from the set of registered JDBC drivers.

Parameters
`url`	`String`: a database url of the form `jdbc:subprotocol:subname`
`info`	`Properties`: a list of arbitrary string tag/value pairs as connection arguments; normally at least a "user" and "password" property should be included

Returns
`Connection`	a Connection to the URL

Throws
`SQLException`	if a database access error occurs

getDriver

Added in API level 1

public static Driver getDriver (String url)

Attempts to locate a driver that understands the given URL. The DriverManager attempts to select an appropriate driver from the set of registered JDBC drivers.

Parameters
`url`	`String`: a database URL of the form `jdbc:subprotocol:subname`

Returns
`Driver`	a `Driver` object representing a driver that can connect to the given URL

Throws
`SQLException`	if a database access error occurs

getDrivers

Added in API level 1

public static Enumeration<Driver> getDrivers ()

Retrieves an Enumeration with all of the currently loaded JDBC drivers to which the current caller has access.

Note: The classname of a driver can be found using d.getClass().getName()

Returns
`Enumeration<Driver>`	the list of JDBC Drivers loaded by the caller's class loader

getLogStream

Added in API level 1
Deprecated in API level 15

public static PrintStream getLogStream ()

This method was deprecated in API level 15.
Use getLogWriter instead.

Retrieves the logging/tracing PrintStream that is used by the DriverManager and all drivers.

Returns
`PrintStream`	the logging/tracing PrintStream; if disabled, is `null`

See also:

setLogStream(PrintStream)

getLogWriter

Added in API level 1

public static PrintWriter getLogWriter ()

Retrieves the log writer. The getLogWriter and setLogWriter methods should be used instead of the get/setlogStream methods, which are deprecated.

Returns
`PrintWriter`	a `java.io.PrintWriter` object

See also:

setLogWriter(PrintWriter)

getLoginTimeout

Added in API level 1

public static int getLoginTimeout ()

Gets the maximum time in seconds that a driver can wait when attempting to log in to a database.

Returns
`int`	the driver login time limit in seconds

See also:

setLoginTimeout(int)

println

Added in API level 1

public static void println (String message)

Prints a message to the current JDBC log stream.

Parameters
`message`	`String`: a log or tracing message

registerDriver

Added in API level 1

public static void registerDriver (Driver driver)

Registers the given driver with the DriverManager. A newly-loaded driver class should call the method registerDriver to make itself known to the DriverManager.

Parameters
`driver`	`Driver`: the new JDBC Driver that is to be registered with the `DriverManager`

Throws
`SQLException`	if a database access error occurs

setLogStream

Added in API level 1
Deprecated in API level 15

public static void setLogStream (PrintStream out)

This method was deprecated in API level 15.
Use setLogWriter instead.

Sets the logging/tracing PrintStream that is used by the DriverManager and all drivers.

In the Java 2 SDK, Standard Edition, version 1.3 release, this method checks to see that there is an SQLPermission object before setting the logging stream. If a SecurityManager exists and its checkPermission method denies setting the log writer, this method throws a java.lang.SecurityException.

Parameters
`out`	`PrintStream`: the new logging/tracing PrintStream; to disable, set to `null`

Throws
`SecurityException`	if a security manager exists and its `checkPermission` method denies setting the log stream

See also:

setLogWriter

Added in API level 1

public static void setLogWriter (PrintWriter out)

Sets the logging/tracing PrintWriter object that is used by the DriverManager and all drivers.

There is a minor versioning problem created by the introduction of the method setLogWriter. The method setLogWriter cannot create a PrintStream object that will be returned by getLogStream---the Java platform does not provide a backward conversion. As a result, a new application that uses setLogWriter and also uses a JDBC 1.0 driver that uses getLogStream will likely not see debugging information written by that driver.

Starting with the Java 2 SDK, Standard Edition, version 1.3 release, this method checks to see that there is an SQLPermission object before setting the logging stream. If a SecurityManager exists and its checkPermission method denies setting the log writer, this method throws a java.lang.SecurityException.

Parameters
`out`	`PrintWriter`: the new logging/tracing `PrintStream` object; `null` to disable logging and tracing

Throws
`SecurityException`	if a security manager exists and its `checkPermission` method denies setting the log writer

See also:

setLoginTimeout

Added in API level 1

public static void setLoginTimeout (int seconds)

Sets the maximum time in seconds that a driver will wait while attempting to connect to a database.

Parameters
`seconds`	`int`: the login time limit in seconds; zero means there is no limit

See also:

getLoginTimeout()