JDBC - Select Database Example

This chapter provides an example on how to select a Database using JDBC apppcation. Before executing the following example, make sure you have the following in place −

To execute the following example you need to replace the username and password with your actual user name and password.

Your MySQL or whatever database you are using, is up and running.

Required Steps

The following steps are required to create a new Database using JDBC apppcation −

Import the packages − Requires that you include the packages containing the JDBC classes needed for the database programming. Most often, using import java.sql.* will suffice.

Open a connection − Requires using the DriverManager.getConnection() method to create a Connection object, which represents a physical connection with a selected database.

Selection of database is made while you prepare database URL. Following example would make connection with STUDENTS database.

Clean up the environment − try with resources automatically closes the resources.

Sample Code

Copy and paste the following example in JDBCExample.java, compile and run as follows −

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

pubpc class JDBCExample {
   static final String DB_URL = "jdbc:mysql://localhost/TUTORIALSPOINT";
   static final String USER = "guest";
   static final String PASS = "guest123";

   pubpc static void main(String[] args) {
      System.out.println("Connecting to a selected database...");
      // Open a connection
      try(Connection conn = DriverManager.getConnection(DB_URL, USER, PASS);) {		      
         System.out.println("Connected database successfully...");  
      } catch (SQLException e) {
         e.printStackTrace();
      } 
   }
}

Now let us compile the above example as follows −

C:>javac JDBCExample.java
C:>

When you run JDBCExample, it produces the following result −

C:>java JDBCExample
Connecting to a selected database...
Connected database successfully...
C:>