Why wont this loop properly?

[bushnerd]

I am having trouble getting this to loop properly. I want it to loop until they enter a proper time under 4.5 seconds. When I enter it, it just ends the program.

Thanks

code:

import javax.swing.*; public class height {                 public static void main (String[]args) {                 double time, answer;                 String inputStr;                 inputStr = JOptionPane.showInputDialog(null, "Enter a time less then 4.5 seconds");                 time = Double.parseDouble(inputStr);                 while (time >4.5){                                 if (time <= 4.5) {                         answer = 100-4.9*time*time;                         JOptionPane.showMessageDialog(null,"The height of the object is: " +answer);                 } else {                 JOptionPane.showMessageDialog(null,"please enter a valid number under 4.5");                         }                         }                 }         }

[Hikaru79]

Look at the following two lines, as you wrote them in your program:

Java:

while (time >4.5){             if (time <= 4.5) {

I'm sure you can see now what is wrong here