Java Question - RevisionQ2.java:15: ';' expected?

Question

public class RevisionQ2
{
public static void main( String args[] )


{
double x, y;
String input;


input = JOptionPane.showInputDialog( null, "Enter value for x:" );
x = Double.parseDouble( input );
y = x*x*x+6x*x+12x+8;

// display answer in message dialog
JOptionPane.showMessageDialog( null,"x*x*x+6x*x+12*x+8"+ y +" for x ="+ x );
}
}

whenever i compile it, i always have this error msg
RevisionQ2.java:15: ';' expected
y = x*x*x+6x*x+12x+8;

any helps on it?
thanks alot!

Answer 1

I think you want this:

y = x*x*x+6*x*x+12*x+8

not this:

y = x*x*x+6x*x+12x+8

Answer 2

Try commenting out the line that does your showMessageDialog and replacing it with something like a System.out.Println.

Something in that line doesn't look right..

If commenting that line out allows you to compile,
then start slowly and add

JOptionPane.showMessageDialog(null,"hello");

and keep building on it like that until you get back to where your code is now.

Answer 3

Switch statement expects int or char as argument.