java - 如何设置 JOptionPane 的位置

Question

我正在创建这个 JOptionPane

JOptionPane.showMessageDialog(this, "File was saved", "Save", 
   JOptionPane.INFORMATION_MESSAGE);

但是我的 JFrame 很大，所以它可以滚动。当我调用这个命令时，在右下角创建了一个窗口，我只能看到标题。如何更改此 JOptionPane 的位置？

Answer 1

根据 api 1.6:

the first parameter is parentComponent:

Defines the Component that is to be the parent of this dialog box. It is used in two ways: the Frame that contains it is used as the Frame parent for the dialog box, and its screen coordinates are used in the placement of the dialog box. In general, the dialog box is placed just below the component. This parameter may be null, in which case a default Frame is used as the parent, and the dialog will be centered on the screen (depending on the L&F).

所以没有参数来设置 JOptionPane 的位置，但您至少可以将 null 作为 第一个参数 传递，以确保您的 JOptionPane 清晰可见并居中。