如何键入此反射警告？

Question

(set! *warn-on-reflection* true)
(proxy [javax.swing.JPanel] []
  (paintComponent [#^java.awt.Graphics g]
    (proxy-super paintComponent g)
    (.fillRect g 100 100 10 10)))

“反射警告，无法解析对paintComponent的调用”

Answer 1

看起来警告是针对该行

(proxy-super paintComponent g)

javax.swing.JPanel的父类是否有paintComponent方法？

删除该行对我有用。

Answer 2

因为proxy-super使用隐式this。

(let [^javax.swing.JPanel this this]
  (proxy-super paintComponent g))