i know this is proper simple java. It's only practise stuff for if statements with Joptionpane, but what puzzles me is why does the program compile when i'm using 'System.out.println' but does not compile when im using the 'JOptionPane.showMessageDialog'


For example (from code below)=
________________________________
if (input1.equals ("M")
{
JOptionPane.showMessageDialog("Monday"
}
________________________________
instead of the 'System.out.println("Monday" being where JOptionPane.showMessageDialog is (in code above)



Code as stands = compiles fine
_____________________________________
import javax.swing.JOptionPane;
public class DaysOfWeek
{
public static void main(String[] args)
{

String input1 = JOptionPane.showInputDialog("Enter your input" ) ;

if (input1.equals ("M")
{
System.out.println ("Monday" ) ;
}
else if (input1.equals ("Tu")
{
System.out.println ("Tuesday" ) ;
}
else if (input1.equals ("W")
{
System.out.println ("Wednesday" ) ;
}
else if (input1.equals ("Th")
{
System.out.println ("Thursday" ) ;
}
else if (input1.equals ("F")
{
System.out.println ("Friday" ) ;
}
else if (input1.equals ("Sa")
{
System.out.println ("Saturday" ) ;
}
else if (input1.equals ("Su")
{
System.out.println ("Sunday" ) ;
}
else
{
System.out.println ("Enter the shortcut codes 'M' 'Tu' etc" ) ;
}

}
}
_____________________

sorry about the faces LOL