Developing Java Swing Open VPN Client

When developers are making something very serious, like an open vpn client or a networking program, they need to use Java Swing. Unlike the Abstract Window Toolkit every aspect of Swing is totally independent of the platform it runs on. That means that the look and feel of the window a program runs in will appear totally the same regardless of the operating system its running on.

Developing for Swing

Java swing components always look professional, but each one of them has to be imported will a line of code. Most basically a person needs to at least have a:

import java.awt.FlowLayout;

line to ensure that they can actually create a window. Anytime java swings are used they’ll need to import more. If someone wanted labels and buttons in a specific group of java applications they’d need to:

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;

While it’s very different from writing to the console, it’s still easy to use some basic java swing components to print text to the user through the window. The frame itself needs a name, which then becomes the name used at the top of a window.

JFrame a = new JFrame("I'm a java swings window!");

They can also use that label they imported before to put some text in the window:

a.add(new JLabel("I'm a friendly window!"));

They’ll probably also want to make sure that the button itself has text as well so the user knows when to press it:

a.add(new JButton("Click to Continue"));
java swing components

image credit: ibm.com

Swinging Around with Java

Those who need to mass manufacture java desktop applications will want to put some of their code into encapsulated files, and professional programmers are always making ready use of this sort of technique. Swing should help to avoid making people develop and draw their own graphics, however. In fact entire applications have been developed using the technique. Naturally all of the individual Swing commands have to be inside of a public program class to be activated.

Want to see more samples? Check our sample Java code based on real assignment>>>