我有以下代码:
import javax.swing.*
...
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName())
UIManager.put("ToolTip.border", BorderFactory.createEmptyBorder())
UIManager.put("PopupMenu.border", BorderFactory.createEmptyBorder())
...
我想摆脱所有UIManager.
限定符,如下所示:
UIManager.run {
setLookAndFeel(getCrossPlatformLookAndFeelClassName())
put("ToolTip.border", BorderFactory.createEmptyBorder())
put("PopupMenu.border", BorderFactory.createEmptyBorder())
...
}
当然,这段代码不能编译。有可能实现吗?
您可以使用'with'关键字来实现这一目标。这是Kotlin的范围界定功能之一。
with(UIManager)
{
setLookAndFeel(getCrossPlatformLookAndFeelClassName())
put("ToolTip.border", BorderFactory.createEmptyBorder())
put("PopupMenu.border", BorderFactory.createEmptyBorder())
...
}
最终你期待某种范围的功能。本文详细解释了Kotlin中每个范围函数的用例。 https://medium.com/@elye.project/mastering-kotlin-standard-functions-run-with-let-also-and-apply-9cd334b0ef84