[英]JOptionPane using JPanel
我试图将JPanel
与JOptionPanel
结合使用,以便可以修改警报窗口的大小。 我写的代码是这样的:
JPanel panel = new JPanel();
//panel.setBackground(Color.RED);
panel.setPreferredSize(new Dimension(500,500));
// display the jpanel in a joptionpane dialog, using showMessageDialog
JFrame frame = new JFrame("JOptionPane showMessageDialog component example");
while (AlarmRS.next()) {
System.out.println(AlarmRS.getString("Description"));
//JOptionPane.showInternalMessageDialog(null, getPanel(), AlarmRS.getString("Description"), JOptionPane.INFORMATION_MESSAGE);
JOptionPane.showMessageDialog(frame,panel, AlarmRS.getString("Description"), JOptionPane.WARNING_MESSAGE);
}
但是,当我运行该程序时,说明应该在中间,但进入标题栏。 如何使这项工作有效,使描述成为警报窗口的主要文字?
showMessageDialog
的JavaDocs清楚地指出,第三个参数是对话框的title
( “对话框的标题字符串” )
而是创建一个JLabel
其文本设置为要显示的内容,然后将其添加到panel
JPanel panel = new JPanel(new GridBagLayout());
//panel.setBackground(Color.RED);
panel.setPreferredSize(new Dimension(500, 500));
while (AlarmRS.next()) {
System.out.println(AlarmRS.getString("Description"));
panel.add(new JLabel(AlarmRS.getString("Description")));
//JOptionPane.showInternalMessageDialog(null, getPanel(), AlarmRS.getString("Description"), JOptionPane.INFORMATION_MESSAGE);
JOptionPane.showMessageDialog(frame, panel, "This is a title", JOptionPane.WARNING_MESSAGE);
}
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