Let us take a closer look at the PgAdmin JDBC connection string with the support of our Server management support services at Bobcares.

Connecting To The PostgreSQL Database for PgAdmin JDBC connection string

Let us take some notes on how to set up the Java environment, download the PostgreSQL JDBC driver, and connect to the PostgreSQL database server from a Java program.

Setting up Java development environment

JDK must be installed on the computer in order to construct a Java program. To get started with JDK, we must first visit the Oracle website and download the most recent JDK. We can then install it on the machine.

The installation is simple; we simply accept the default options offered by the installer.

In practice, we need a good IDE to develop Java applications. Many good IDEs are available for free, including Eclipse, NetBeans, IntelliJ IDEA Community Edition, and others.

In this tutorial, we will create Java apps using the NetBeans IDE. The NetBeans IDE can be downloaded directly from the Oracle website or via the NetBeans download page.

Download PostgreSQL JDBC Driver

A PostgreSQL JDBC driver is required to connect to the PostgreSQL database server from a Java program.

We can get the most recent version of the driver from the postgresql.org website’s download page.

The file we downloaded is a jar file. We should copy it to a specific folder, such as C:demolibs, so that we can remember where it is and add it to the Java application later.

Connect to the PostgreSQL database server

First, build a new project called PostgreSQLJDBC and a primary class called App.

Second, include the PostgreSQL JDBC driver jar file in the project.

Third, we need to get the following things ready:

• The PostgreSQL database server’s address, for example, localhost
• The database name, for example, dvdrental
• The username and password for the database account that we will use to connect to.

We can use the following format to create the PostgreSQL JDBC connection string for this information:

jdbc:postgresql://:/Code language: SQL (Structured Query Language) (sql)

This is optional.

The connection string in this case is as follows:

jdbc:postgresql://localhost/dvdrentalCode language: SQL (Structured Query Language) (sql)

To make things easier, we can specify the App class’s attributes for storing the connection string, user, and password as follows:

private final String url = "jdbc:postgresql://localhost/dvdrental"; private final String user = "postgres"; private final String password = "";Code language: Java (java)

To connect to the PostgreSQL database server, we use the DriverManager class’s getConnection function. The Connection object will return in this method.

The connect() method establishes a connection to the PostgreSQL database server and returns a Connection object.

public Connection connect() {
Connection conn = null;
try {
conn = DriverManager.getConnection(url, user, password); System.out.println("Connected to the PostgreSQL server successfully.");
} catch (SQLException e) {
System.out.println(e.getMessage());
}
return conn;
}Code language: Java (java)

The following is the complete software for connecting to a PostgreSQL database server and make sure to go through every singe coding steps for pgadmin jdbc connection string:

package com.postgresqltutorial;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
/**
*
* @author postgresqltutorial.com
*/
public class App{
private final String url = "jdbc:postgresql://localhost/dvdrental";
private final String user = "postgres";
private final String password = "";
/**
* Connect to the PostgreSQL database
*
* @return a Connection object
*/
public Connection connect() {
Connection conn = null;
try {
conn = DriverManager.getConnection(url, user, password); System.out.println("Connected to the PostgreSQL server successfully.");
} catch (SQLException e{
System.out.println(e.getMessage());
}
return conn;
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
App app = new App();
app.connect();
}
}
Code language: Java (java)

After that, we should be able to successfully connect to the PostgreSQL database server.

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Conclusion

We’ve now seen and learned more about the PgAdmin JDBC connection string and how to set up the Java development environment for working with PostgreSQL databases with the support of Server management support services.