## 桌面应用
Clojure 可以创建基于Swing的GUI程序。下面是一个简单的例子， 用户可以输入他们的名字，然后点击“Greet：按钮，然后它会弹出一个对话框显示一个欢迎信息。可以关注一下这里我们使用了 `proxy` 宏来创建一个集成某个指定类 ( `JFrame` )并且实现了一些java接口 (这里只有 `ActionListener` 一个接口)的对象。.
 
```
(ns com.ociweb.swing
(:import
(java.awt BorderLayout)
(java.awt.event ActionListener)
(javax.swing JButton JFrame JLabel JOptionPane JPanel JTextField)))
(defn message
"gets the message to display based on the current text in text-field"
1
(str "Hello, " (.getText text-field) "!"))
; Set the initial text in name-field to "World"
; and its visible width to 10.
(let [name-field (JTextField. "World" 10)
greet-button (JButton. "Greet")
panel (JPanel.)
frame (proxy [JFrame ActionListener]
[] ; superclass constructor arguments
(actionPerformed [e] ; nil below is the parent component
(JOptionPane/showMessageDialog nil (message name-field))))]
(doto panel
(.add (JLabel. "Name:"))
(.add name-field))
(doto frame
(.add panel BorderLayout/CENTER)
(.add greet-button BorderLayout/SOUTH)
(.pack)
(.setDefaultCloseOperation JFrame/EXIT_ON_CLOSE)
(.setVisible true))
; Register frame to listen for greet-button presses.
(.addActionListener greet-button frame))
```
