Changing the title of a JOptionPane?

Question

What my program should do, is when you put in a string like "two", instead of a number, a popup will show up saying: You must enter positive numeric data! I have that part down, but I want to change the title on the top of the popup. Right now it just says "Message".

catch (NumberFormatException e)
{
   JOptionPane.showMessageDialog(this, "You must enter positive numeric data!");
}

I need it to look more like this: http://homepages.uc.edu/~thomam/OOProg_1/assignment3.html

By the way, I'm using NetBeans as my IDE.

Answer 1

Look at the JOptionPane API and you'll see showMessageDialog method overloads that take more parameters that will do what you need.

eg,

public static void showMessageDialog(Component parentComponent,
                 Object message,
                 String title,
                 int messageType)

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