how do I create a Java swing UI like this?

Below UI is something I'd like to aim for. But I have no idea, how they have the "skin" of the app. On my end, the Java application looks like it was made in 1990s. I want to chang开发者_Python百科e a look to a more modern style.

What components are they using possibly here? JSplitpane for one. but I'm not sure how they created that "Dokument/Vorschau" tabs.

First using a look and feel like Nimbus, can easily change the look of your application to a have a more modern feel.

Second, you will need to customize the font, color, borders, node icons, etc. of each component type to achieve a non-standard look. Some of these can be changed with updates to the UIDefaults of the look and feel but many will be made by calling methods on the specific instance of the component you are dealing with.

Try a javax.swing.JTabbedPane.

If you really want to change the complete look-and-feel of your application from scratch, you should take a look at Synth L'n'F. You can define style and appearance of components and bind them to components which match certain criteria.

(My opinion on that matter: heavily themed apps usually look and feel out-of-the-place and only make it harder to use the app, so I'd actually try to avoid themeing)