How to code a Cancel button in a frame

hello..i'm new to java..and i'm currently working on a project that displays a 'Quiz' screen, meaning a new frame from the main frame..
the problem is, how do i code the Cancel button in the 'Quiz' frame so that only the 'Quiz' frame disappears and leave the main frame for user to view? i've tried using setDefaultCloseOperation( EXIT_ON_CLOSE ); but it seems that it closes all the program..and i don't want that.
how should i do it??
please help me..thanks

1. Check out my StandardDialog class as an example of how to implement a cancel button
2. use either the HIDE_ON_CLOSE or DISPOSE_ON_CLOSE standard closing operations

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what is the value of null compared to when you compare it, and do we use the String.equals() or the String == null to compare? as seen in here i tried with input.equals(null) as a comparison but it deos not exit when i press cancel
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* this program takes in a number and gets the factorial of that number
import javax.swing.*;
public class Factorial {
     public Factorial() {
           * variables intilization, input is where the option pane puts the data
           * number is teh actucal number entered parsed from string result is
           * where the resutl is stored flag1 is the indicator if the user had
           * entered an integer
          String input;
          boolean flag1 = false;
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          long result = 0;
           * this while loop runs continously unless an integer is entered
          while (flag1 != true){
               try {
                    input = JOptionPane
                              .showInputDialog("Enter the number to be factored, Integer only: ");
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                         try {
                              System.exit(0);
                         } catch (SecurityException ea) {
                              System.out.print("ARRRRR its dead!");
               } catch (NumberFormatException ea) {
                    JOptionPane.showMessageDialog(null,
                              "The input was not a integer!", "Warning",
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          for (int x = 1; x < number; x++) {
               result = result * (x);
          JOptionPane.showMessageDialog(null, "The result is: " + result,
                    "Result", JOptionPane.INFORMATION_MESSAGE);
          try {
               System.exit(0);
          } catch (SecurityException ea) {
               System.out.print("ARRRRR its dead!");
     public static void main(String[] args) {
          Factorial One = new Factorial();
}i have also tried to ue input == null, input == "", input.equals(""), input.equals(" ")
Message was edited by:
TheHolyLancer
i edited the part so it is bold
Message was edited by:
TheHolyLancer

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Message was edited by:
Rowdheer
Message was edited by:
Rowdheer

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ssr

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