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---
title: Changing Theme On The Fly
order: 60
layout: page
---
[[changing-theme-on-the-fly]]
Changing theme on the fly
-------------------------
Starting from Vaadin 7.3, you can change themes in the application
without reloading the page. To do this, simply use the
`UI.setTheme(String)` method.
[source,java]
....
public class ThemeChangeUI extends UI {
private String[] themes = { "valo", "reindeer", "runo", "chameleon" };
@Override
protected void init(VaadinRequest request) {
ComboBox themePicker = new ComboBox("Theme", Arrays.asList(themes));
themePicker.setValue(getTheme());
themePicker.addValueChangeListener(new ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
String theme = (String) event.getProperty().getValue();
setTheme(theme);
}
});
setContent(themePicker);
}
}
....
In this way, you can let your users choose the look of your application.
The functionality also makes it easier to create applications that are
branded for different customers.
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