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This chapter provides an example on how to select a Database using JDBC application. Before executing the following example, make sure you have the following in place −
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To execute the following example you need to replace the username and password with your actual user name and password.
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Your MySQL database you are using, is up and running.
Required Steps
The following steps are required to create a new Database using JDBC application −
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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.
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Open a connection − Requires using the DriverManager.getConnection() method to create a Connection object, which represents a physical connection with a selected database.
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Selection of database is made while you prepare database URL. Following example would make connection with STUDENTS database.
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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; public class JDBCExample { static final String DB_URL = "jdbc:mysql://localhost/TUTORIALSPOINT"; static final String USER = "guest"; static final String PASS = "guest123"; public 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:>
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