JOptionPane

1.1 showMessageDialog

JOptionPane.showMessageDialog(null, "友情提示");

JOptionPane.showMessageDialog(jPanel, "提示消息", "标题",JOptionPane.WARNING_MESSAGE);

JOptionPane.showMessageDialog(null, "提示消息.", "标题",JOptionPane.ERROR_MESSAGE);

1.2 showOptionDialog

int n = JOptionPane.showConfirmDialog(null, 
                                      "你高兴吗?", 
                                      "标题",
                                      JOptionPane.YES_NO_OPTION); 
//n = 0/1

Object[] options ={ "好啊！", "去一边！" };  
int m = JOptionPane.showOptionDialog(null, 
                                     "我可以约你吗？", 
                                     "标题",
                                     JOptionPane.YES_NO_OPTION, 
                                     JOptionPane.QUESTION_MESSAGE,
                                     null,
                                     options,
                                     options[0]);

1.3 showInoutDialog

Object[] obj2 ={ "足球", "篮球", "乒乓球" };  
String s = (String) JOptionPane.showInputDialog(null,
                                                "请选择你的爱好:\n",
                                                "爱好", 
                                                JOptionPane.PLAIN_MESSAGE,
                                                new ImageIcon("icon.png"),
                                                obj2, "足球");  
 System.out.println(s);

String title = JOptionPane.showInputDialog(null, 
                                           "请输入：\n", 
                                           "title", 
                                           JOptionPane.PLAIN_MESSAGE);
System.out.println(title);