{"id":4963,"date":"2014-03-30T17:12:45","date_gmt":"2014-03-30T17:12:45","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-joptionpane-collection-of-common-programming-errors\/"},"modified":"2014-03-30T17:12:45","modified_gmt":"2014-03-30T17:12:45","slug":"problem-about-joptionpane-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-joptionpane-collection-of-common-programming-errors\/","title":{"rendered":"problem about joptionpane-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/af2211e1b8e0117c514c416c9d41b1c5?s=32&amp;d=identicon&amp;r=PG&amp;f=1\" \/><br \/>\nuser3055240<br \/>\njava swing combinations permutation joptionpane<br \/>\nI was able to program this, and I don&#8217;t have any errors that I can see, and it even displays the gui. I&#8217;m pretty sure I assigned the buttons properly. But the GUI is temperamental, and when I run it, it displays but sometimes the insides of the gui disappear when I enter values. But it calculates nCr, just not pCr.I have a driver class. Pretty sure it&#8217;s implemented properly. Here&#8217;s my panel class. I&#8217;m wondering what&#8217;s wrong and why the GUI doesn&#8217;t function properlyI realize this is a lot o<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/FOkRA.jpg?s=32&amp;g=1\" \/><br \/>\nJayaprasad<br \/>\njava swing joptionpane jdialog non-modal<br \/>\nI have a non-modal dialog with two input text fields shown with the JOptionPane with OK and CANCEL buttons. I show the dialog as below.JTextField field_1 = new JTextField(&#8220;Field 1&#8221;);JTextField field_2 = new JTextField(&#8220;Field 2&#8221;);Object[] inputField = new Object[] { &#8220;Input 1&#8243;, field_1,&#8221;Input_2&#8221;, field_2 };JOptionPane optionPane = new JOptionPane(inputField,JOptionPane.QUESTION_MESSAGE, JOptionPane.OK_CANCEL_OPTION);JDialog dialog = optionPane.createDialog(null, &#8220;Input Dialog&#8221;);dialog.setModal(fal<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8304c64641badd4218a89a5f97d2ae86?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nEmmanuel Bourg<br \/>\njava dialog joptionpane<br \/>\nI&#8217;ve just tested a little code examples from a book:JOptionPane a = new JOptionPane(); String aName = a.showInputDialog(&#8220;What is your name? :&#8221;);This piece of code opens the dialog box and after 3-5seconds suddenly have been closed. This happens with different dialogs (for example, open_file dialog).Why does it close?PS: I use WinXP prof SP3, jre1.7.0-ea-b113.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/cEOYD.jpg?s=32&amp;g=1\" \/><br \/>\nKarthik T<br \/>\njava if-statement joptionpane<br \/>\nI&#8217;m a beginner, so this result I am getting for one condition of my if else statement is blowing my mind. Everything works properly except for the condition when the QtyCalc variable is &gt;= 100. The Finprice variable is listed as the disc variable and I can&#8217;t figure out why. Help? import javax.swing.JOptionPane; public class SoftwareSales {public static void main(String[] args) {final int price = 99;String Qty;double QtyCalc, preprice, Finprice, disc;Qty = JOptionPane.showInputDialog(null, &#8220;Ho<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/AuY9o.png?s=32&amp;g=1\" \/><br \/>\nAndrew Thompson<br \/>\njava process joptionpane runtime.exec<br \/>\nI have this code:import javax.swing.JOptionPane;class OpenProgram {public static void main(String[] args) throws Exception {\/\/ opens the JOptionPaneString path = JOptionPane.showInputDialog(&#8220;Type the path to a program or other file(forward slashes)&#8221;);\/\/runs the programProcess run = Runtime.getRuntime().exec(&#8220;\\&#8221;&#8221; + path);System.out.println(&#8220;Program Opened!&#8221;);run.waitFor();} }It is supposed to bring up a JOptionPane and have the user type in the path to a program, then run the specified program, b<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/hrHa0.jpg?s=32&amp;g=1\" \/><br \/>\nEogcloud<br \/>\njava class constructor joptionpane<br \/>\nJust a really quick question about something small. The following is part of a programming assignment for my programming 2 class. It focuses on inheritance and multiple classes. I&#8217;ve answered the question but want to consolidate the classes into a main function and actually build something rather than just submitting the bare minimum.My question is the section of code below. The user runs the program, is presented with a dialog asking him as to what he&#8217;s like to add (a CD or a Movie, they&#8217;re bot<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/ayujB.jpg?s=32&amp;g=1\" \/><br \/>\nkleopatra<br \/>\njava swing jframe actionlistener joptionpane<br \/>\nBasically I have a GUI that inherits from the JFrame class and has its own main method.It gives the errorException in thread &#8220;main&#8221; java.lang.NullPointerExceptionat MilesPerGallonApp.buildPanel(MilesPerGallonApp.java:33)at MilesPerGallonApp.&lt;init&gt;(MilesPerGallonApp.java:20)at MilesPerGallonApp.main(MilesPerGallonApp.java:58)Here is the source codeimport javax.swing.*; import java.awt.event.*;public class MilesPerGallonApp extends JFrame {private JPanel panel;private JLabel messageLabel1;pr<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/6edb39bad8a7f0c9ad6042dd3cd22798?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nUt My<br \/>\ncrash windows-7-x64 joptionpane halt eclipse-kepler<br \/>\nI have researched thoroughly on this problem but no use. Hopefully you guys can help me. Thanks very much in advance!The test code is below:import javax.swing.JOptionPane; public class JOptionPane_Test {public static void main(String[] args){String userExit=&#8221;a&#8221;;while (userExit!=null){userExit = JOptionPane.showInputDialog(null, &#8220;Message&#8221;);}} }It simply displays an input box waiting for user&#8217;s response, repeats if user hits OK, and stops if user hits Cancel or X button. The box halts after a rand<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/b1a95a98c108488de4d890e14ce7c279?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nSteve<br \/>\njava eclipse double joptionpane<br \/>\nSo I am working on a program for school, and part of the assignment is to have a bunch of prompts for input pop up. I am using the JOptionPane, which inherently has an OK button and a Cancel button. Now, to make the program exit when they press cancel when the prompt is asking for a string, I have something like this: firstName = JOptionPane.showInputDialog(&#8220;Please enter your first name:&#8221;); if(firstName == null)System.exit(0);But I also have to do the same thing for numbers I get as input, both<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e040c3341f4ccc3aa85ae171fec6e296?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nmoskalak<br \/>\njava swing joptionpane xtend<br \/>\nI realize it might be a very stupid question, but how do I use JOptionPane with Xtend? I can&#8217;t figure it out and I&#8217;ve been trying to get it working for a while now.JOptionPane.showMessageDialog(getContentPane(), message); doesn&#8217;t seem to work.Eclipse gives me this error: The method or field JOptionPane is undefined for the type MyClassName<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>user3055240 java swing combinations permutation joptionpane I was able to program this, and I don&#8217;t have any errors that I can see, and it even displays the gui. I&#8217;m pretty sure I assigned the buttons properly. But the GUI is temperamental, and when I run it, it displays but sometimes the insides of the gui [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4963","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/4963","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=4963"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/4963\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=4963"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=4963"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=4963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}