Java - JDBC - Connecting with Oracle

The steps for connecting to an Oracle database using JDBC in Java:

• Download and install the Oracle database and the Oracle JDBC driver.
• Create a new Java project in your IDE.
• Import the required JDBC packages into your Java project:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

• Load the Oracle JDBC driver using the Class.forName() method:

Class.forName("oracle.jdbc.driver.OracleDriver");

• Define the database URL, username, and password:

String url = "jdbc:oracle:thin:@localhost:1521:ORCL";
String username = "your-username";
String password = "your-password";
//Note: Replace your-username and your-password with your actual Oracle database username and password.

Establish a connection to the Oracle database using the DriverManager.getConnection() method:

Connection connection = DriverManager.getConnection(url, username, password);

• Create a new statement object using the connection.createStatement() method:

Statement statement = connection.createStatement();

• Execute SQL queries using the statement.executeUpdate() or statement.executeQuery() method:

String sql = "SELECT * FROM employees";
ResultSet resultSet = statement.executeQuery(sql);

• Process the results of the SQL queries using the ResultSet object.
• Close the ResultSet, Statement, and Connection objects:

resultSet.close();
statement.close();
connection.close();

Note: It is recommended to use a try-with-resources statement to automatically close the ResultSet, Statement, and Connection objects to avoid resource leaks.

These are the basic steps for connecting to an Oracle database using JDBC in Java.