?– Stored procedure is a group of SQL statements that forms a logical unit and performs a particular task. Stored Procedures are used to encapsulate a set of operations or queries to execute on database. Stored procedures can be compiled and executed with different parameters and results and may have any combination of input/output parameters.

In the context of Core Java, a stored procedure typically refers to a database object that consists of one or more SQL statements compiled and stored on the database server. These procedures can be executed by applications or other stored procedures, providing a way to encapsulate and reuse database logic.

Key characteristics of stored procedures include:

Precompiled and Stored on the Database Server: Stored procedures are precompiled and stored on the database server, which can improve performance by reducing the need for repetitive compilation of SQL statements.
Encapsulation of Business Logic: Stored procedures allow for the encapsulation of complex business logic on the database server. This promotes code reusability and can enhance security by controlling access to the underlying tables.
Input and Output Parameters: Stored procedures can take input parameters and return output parameters, allowing for flexibility in the execution of database logic.
Transaction Management: Stored procedures can participate in database transactions, providing a way to group multiple SQL statements into a single atomic operation.

In Java, you can interact with stored procedures using JDBC (Java Database Connectivity) to execute them from your Java applications. This involves creating a CallableStatement, setting parameters, and executing the stored procedure.

Here’s a simple example using JDBC:

java

import java.sql.CallableStatement;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

public class StoredProcedureExample {

public static void main(String[] args) {
try (Connection connection = DriverManager.getConnection(“jdbc:mysql://localhost:3306/your_database”, “username”, “password”)) {

// Example stored procedure call with input and output parameters
String storedProcedureCall = “{CALL your_stored_procedure(?, ?)}”;

try (CallableStatement callableStatement = connection.prepareCall(storedProcedureCall)) {
// Set input parameters
callableStatement.setString(1, “input_parameter_value”);

// Register output parameters (if any)
callableStatement.registerOutParameter(2, java.sql.Types.INTEGER);

// Execute the stored procedure
callableStatement.execute();

// Retrieve output parameters (if any)
int outputParameter = callableStatement.getInt(2);
System.out.println(“Output Parameter: “ + outputParameter);
}

} catch (SQLException e) {
e.printStackTrace();
}
}
}

Note: Replace “your_database”, “username”, “password”, “your_stored_procedure”, and “input_parameter_value” with your actual database details and stored procedure information.