Swing中paint,paintComponent和paintComponents之间的区别 [英] Difference between paint, paintComponent and paintComponents in Swing

查看:161
本文介绍了Swing中paint,paintComponent和paintComponents之间的区别的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

paint() paintComponent() paintComponents之间的实际差异是什么? Java Swing中的()

我试图理解Oracle文档中的解释,但我不清楚。

I tried to understand what explained in Oracle docs but I am not clear.

推荐答案


  • AWT,覆盖 paint()

  • Swing顶级容器(例如 JApplet JFrame JWindow JDialog ..),覆盖 paint()。但是有一些很好的理由在TLC中绘画。也许是一个单独问题的主题。

  • Swing的其余部分,覆盖 paintComponent()

  • 既不覆盖也不显式调用 paintComponents(),将其留给API以在需要时调用它。

    • AWT, override paint().
    • Swing top-level container (e.g.s are JApplet, JFrame, JWindow, JDialog..), override paint(). But there are a number of good reasons not to paint in a TLC. A subject for a separate question, perhaps.
    • The rest of Swing, override paintComponent().
    • Neither override nor explicitly call paintComponents(), leave it to the API to call it when needed.
    • 请务必在覆盖方法时使用 @Override 表示法。

      Be sure to also use @Override notation whenever overriding a method.

      这样做会暗示试图在 JFrame paintComponent(..)的问题$ c>(它没有这样的方法),这很常见。

      Doing so would hint at the problem of trying to override paintComponent(..) in a JFrame (it has no such method), which is quite common to see.

      这篇关于Swing中paint,paintComponent和paintComponents之间的区别的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆