java - and in a String variable does not display in JOptionPane.showMessageDialog

Question

I am trying to accumulate a String in a variable but the tab and newline does not take effect.

Here is my code:

String message = "";

for(int i=1; i<=5; i++)
{
    message += i +"";
}

JOptionPane.showMessageDialog(null, message);

It only displays:

1 2 3 4 5 

instead of having tabs between the numbers

Answer 1

Put the message to the JTextArea as follows.

String message = "";

for(int i=1; i<=5; i++){
    message += i +"";
}
JOptionPane.showMessageDialog(null, new JTextArea(message));