What is sql class in Java?
The java. sql package contains the entire JDBC API that sends SQL (Structured Query Language) statements to relational databases and retrieves the results of executing those SQL statements. … The Statement, PreparedStatement, and CallableStatement interfaces support the execution of various kinds of SQL statements.
Which is found in the Java sql package?
Package java. sql
|CallableStatement||The interface used to execute SQL stored procedures.|
|Clob||The mapping in the JavaTM programming language for the SQL CLOB type.|
|Connection||A connection (session) with a specific database.|
|DatabaseMetaData||Comprehensive information about the database as a whole.|
What are the classes available in JDBC?
The following are core JDBC classes, interfaces, and exceptions in the java.sql package:
- DriverManager. The DriverManager class (java. …
- Connection. …
- Statement. …
- PreparedStatement. …
- CallableStatement. …
- ResultSet. …
- ParameterMetaData. …
Is statement a class in Java sql package?
Although the JDBC™ API is mainly geared to passing SQL statements to a database, it provides for reading and writing data from any data source with a tabular format.
|Types||The class that defines the constants that are used to identify generic SQL types, called JDBC types.|
What are observable classes for?
A class that implements the Observable interface allows the registration of listeners that want to be notified of property changes of on the observable object.
How many packages are available in JDBC API?
The JDBC API is comprised of two packages: java. sql.
What is Interface class in Java?
An interface in the Java programming language is an abstract type that is used to specify a behavior that classes must implement. … A class that implements an interface must implement all of the non-default methods described in the interface, or be an abstract class.
What is class forName in Java with example?
forName(String name, boolean initialize, ClassLoader loader) method returns the Class object associated with the class or interface with the given string name, using the given class loader. The specified class loader is used to load the class or interface.
What is JDBC in j2ee?
Java Database Connectivity (JDBC) is an application programming interface (API) for the programming language Java, which defines how a client may access a database. … It is part of the Java Standard Edition platform, from Oracle Corporation.
What is Java Net package?
The java.net package allows you to do low-level networking with DatagramPacket objects which may be sent and received over the network through a DatagramSocket object. In Java 1.1, the package has been extended to include a MulticastSocket class that supports multicast networking.