2. 计算机
  3. WindowListener中可以实现窗口关闭功能的方法是

WindowListener中可以实现窗口关闭功能的方法是

admin2006-08-25  53
问题 WindowListener中可以实现窗口关闭功能的方法是
选项 A、public void windowOpened(WindowEvent e)
B、public void windowClosed(WindowEvent e)
C、public void windowClosing(WindowEvent e)
D、public void windowDeactivated(WindowEvent e)
答案B
解析 本题考查事件监听器的概念。窗口事件接口WindowListener有几个关键方法，应该注意，如public void windowClosing(WindowEvent e)是把退出窗口的语句写在本方法中；public void windowOpened(WindowEvent e)是窗口打开时调用；public void windowClosed(WindowEvent e)是窗口关闭时调用，选项B正确：public void windowIconified(WindowEvente)是窗口图标化时调用；public void windowDeiconified (WindowEvent e)是窗口非图标化时调用：public void windowActivated(WindowEvent e)是窗口激活时调用；public void windowDeactivated(WindowEvent e)是窗口非激活时调用。
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本试题收录于： 二级Java题库NCRE全国计算机二级分类
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