Java里的JOptionPane.showMessageDialog(),括号里要填什么?

2025-03-07 04:12:09
推荐回答(4个)
回答(1):

第一个参数是控制弹出对话框相对的中心位置,如果是null,则是在屏幕中间,如果是其它组件参数,则会在其它组件的中心弹出。

回答(2):

showMessageDialog(Component parentComponent, Object message)
调出标题为 "Message" 的信息消息对话框。showMessageDialog(Component parentComponent, Object message, String title, int messageType)
调出对话框,它显示使用由 messageType 参数确定的默认图标的 message。showMessageDialog(Component parentComponent, Object message, String title, int messageType, Icon icon)
调出一个显示信息的对话框,为其指定了所有参数。 具体的看jdk api文档

回答(3):

null就是默认从中间填

回答(4):

是填参数的

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