java.sql.Statement is used for executing a static SQL statement and returning the results it produces. Statement interface has two subinterfaces- PreparedStatement– Stores a precompiled SQL statement which can then be used to execute this statement multiple times by passing different values for the parameters. CallableStatement– Used to execute SQL stored…
java.sql.Driver interface in JDBC API is one interface that every Driver class has to implement compulsorily. Each driver should supply a class that implements the Driver interface. When you load/register a driver by any of the following ways, Driver class implementation is loaded. After the class is loaded it creates…
Using Java Connection interface you can create a session with a specific database. SQL statements are executed and results are returned within the context of a connection. Connection interface in JDBC API resides in java.sql package. How to get Connection instance You can create Connection object using DriverManager.getConnection() method. Once…
java.sql.DriverManager class in JDBC API in Java is a utility class to manage a set of JDBC drivers. Before connection to DB and start any DB operation you will have to register the driver for that specific DB with the DriverManager class. Java DriverManager class methods Main task of the…
JDBC API in Java programming language provides a standard, universal way to connect to databases. It is the responsibility of different DB vendors to provide the implementation of the interfaces in JDBC API and that implementation by DB vendors is provided as JDBC drivers. Table of contents Types of JDBC…
In this post we’ll go through the steps to connect your Java application to the Database using JDBC. Steps that are to be followed are as given below- 1. Register the appropriate driver for the DB 2. Create connection object by passing Database URL, DB user and DB password. 3.…
If you are doing some calculation in your Java application where precise value is required such as in financial operations you should not be using float or double primitive type. Same way if you want to store a very large number, for example if you are calculating factorial then again…
Since array in Java is also a class so many of the methods in java.lang.Class can be used with the array too. Apart from that in Java Reflection API there is a class java.lang.reflect.Array that has methods for creating new arrays, getting and setting array elements at run time. Table…
Using Java Reflection you can get information about the constructors of the class and create a new class instance too. In Java Reflection API there is a class java.lang.reflect.Constructor that has methods for finding constructors, retrieving constructor modifiers and creating new instance. Table of contents Getting Constructor instance Getting information…
Using Java Reflection API you can get information about the methods of the class and even invoke methods at run time. In Java Reflection API there is a class java.lang.reflect.Method that has methods for accessing field’s type, field’s modifier and setting and getting values of a field. Table of contents…
