javax.swing.JOptionPane.showMessageDialog() 方法

//default title and icon          





JOptionPane.showMessageDialog(frame,"Eggs are not supposed to be green.","Message");            

//custom title, warning icon





JOptionPane.showMessageDialog(frame,"Eggs are not supposed to be green.", "Inane warning",JOptionPane.WARNING_MESSAGE);  

//custom title, error icon





JOptionPane.showMessageDialog(frame,"Eggs are not supposed to be green.", "Inane error",JOptionPane.ERROR_MESSAGE);

//custom title, no icon



      
JOptionPane.showMessageDialog(frame,"Eggs are not supposed to be green.","A plain message", JOptionPane.PLAIN_MESSAGE);

//custom title, custom icon



            

JOptionPane.showMessageDialog(frame, "Eggs are not supposed to be green.", "Inane custom dialog", JOptionPane.INFORMATION_MESSAGE,icon);