摘要：1.1 showMessageDialog显示一个带有OK按钮的模态对话框。下面是几个使用showMessageDialog的例子：Java代码JOptionPane.showMessageDialog(null,"友情提示");效果如下：Java代码JOptionPane.showMessageDialog(jPanel,"提示消息","标题",JOptionPane.WARNING_MESSAGE);效果如下：Java代码JOptionPane.showMessageDialog(null,"提示消息.",&q 阅读全文