JOptionPane won't accept long type

Question

I am having an issue within the parameters of my JOptionPane MessageDialog. I am trying to print out the list of usernames that are in my array list, along with there corresponding time stamp for when they logged in.

Code:

Calendar currentDay = Calendar.getInstance();

loginArray.add(userName);
JOptionPane.showMessageDialog(null, loginArray.get(0), currentDay.getTimeInMillis()); 

Error:

gui.java:299: error: no suitable method found for showMessageDialog(<null>,String,long)

I understand what the error is saying, but I have tried to cast it to a String, etc and it won't allow me to... Should I try toString?

Answer 1

Of course it doesn't, the Java Docs clearly state

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

And I don't know why you're trying to pass currentDay.getTimeInMillis as the message parameter, the Java Docs state

messageType - the type of message to be displayed: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE

Some idea of what you are tying to achieve might help use to provide you with a solution

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