PGSimpleDataSource dataSource = new PGSimpleDataSource();
dataSource.setDatabaseName(YOUR_DATABASE_NAME);
The easiest way to get the PostgreSQL JDBC driver is using Maven.
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4.1207</version>
</dependency>
Make sure the JDBC version of the driver matches your Java version.
| Java Version | JDBC Version |
|---|---|
| Java 1.6 | JDBC 4.0 |
| Java 1.7 | JDBC 4.1 |
| Java 1.8 | JDBC 4.2 |
For more information check out the Connecting to the Database chapter of the official documentation.