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How to implement JOptionPane.showConfirmDialog in my code

Posted on 2004-09-29
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Last Modified: 2006-11-17
This is what I have gotten so far and it debugs with no errors. Now I need to implement the JOptionPane.showConfirmDialog function to prompt the user as to whether 'End program' or not.

<code>
  public static void main(String args[]) throws IOException {
    BufferedReader stdin  = new BufferedReader (new InputStreamReader(System.in));  //Declare stdin  Input
    String yearString, valueString; //Define variable yearString, valueString
    // Prompt the user to enter the degree in fahrenheit
    String fahrenheitString = JOptionPane.showInputDialog(null,
        "Enter a Fahrenheit degree to convert it to Celsius", "Input", JOptionPane.QUESTION_MESSAGE);
    // Convert String to Double
    double Fahrenheit = Double.parseDouble(fahrenheitString);
    // Convert from Fahrenheit to Celsius
    double Celsius = (5.0/9) * (Fahrenheit - 32);
    // Display output
    String output = + Fahrenheit + " degree fahrenheit is equal to " + Celsius + " degree celsius";
    JOptionPane.showMessageDialog(null, output, "Output", JOptionPane.INFORMATION_MESSAGE);

    System.exit(0);
</code>
Thanks
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Question by:biloonline
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7 Comments
 
LVL 92

Expert Comment

by:objects
ID: 12184801
if (JOptionPane.YES_OPTION==JOptionPane.showConfirmDialog(null, "Do you want to exit?"))
{
   System.exit(0);
}
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Author Comment

by:biloonline
ID: 12185075
When I hit 'No', it terminates the loop, instead of re-asking the question.
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LVL 92

Expert Comment

by:objects
ID: 12185103
can you post your loop?
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Author Comment

by:biloonline
ID: 12185271
I just added the statement you posted at the end of my code.
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LVL 92

Accepted Solution

by:
objects earned 200 total points
ID: 12185279
you need to add a loop, try:

do
{
    String fahrenheitString = JOptionPane.showInputDialog(null,
        "Enter a Fahrenheit degree to convert it to Celsius", "Input", JOptionPane.QUESTION_MESSAGE);
    // Convert String to Double
    double Fahrenheit = Double.parseDouble(fahrenheitString);
    // Convert from Fahrenheit to Celsius
    double Celsius = (5.0/9) * (Fahrenheit - 32);
    // Display output
    String output = + Fahrenheit + " degree fahrenheit is equal to " + Celsius + " degree celsius";
    JOptionPane.showMessageDialog(null, output, "Output", JOptionPane.INFORMATION_MESSAGE);
}
while (JOptionPane.YES_OPTION=!JOptionPane.showConfirmDialog(null, "Do you want to exit?"));
0
 

Author Comment

by:biloonline
ID: 12196395
Thank you.
0
 
LVL 92

Expert Comment

by:objects
ID: 12196419
no worries :)
0

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