java - Null Pointer Exception Error on a Constructor -


तो मेरे पास एक कन्स्ट्रक्टर है जो पेंडेमिक मोडेल को दूसरी ग्रिड की प्रतिलिपि बनाता है जिसे इस .grid कहते हैं। मुझे java.lang.NullPointerException और एक अन्य त्रुटि यह कहने में एक त्रुटि है कि जब मैं ग्रहण पर त्रुटि को क्लिक करता हूं तो यह मेरे आखिरी कथन को नेस्टेड लूप पर हाइलाइट करता है। मुझे नहीं पता कि समस्या कैसे ठीक करें किसी भी विचार? 

  / ** * प्रतिलिपि कन्स्ट्रक्टर * यह माना जाता है कि अन्य नल नहीं है और यह कि यह मस्तिष्कमॉडल * अन्य की एक गहरी प्रति है (यानी, अन्य। ग्रिड को एक नए में कॉपी किया गया है * 2-मंद सरणी इस। ग्रिड) * @ परम अन्य महामारी मोडेल जो प्रतिलिपि बनाई गई है * / सार्वजनिक महामारी मोडेल (अन्य महामारी मण्डल) {this.rows = other.rows; This.column = other.column; के लिए (int i = 0; i & lt; अन्य। आरओ; i ++) {के लिए (इंट जे = 0; जे एंड एलटी; अन्य.columns; j ++) {this.grid [i] [जे] = अन्य। ग्रिड [आई] [जे ]; मैं जानता हूं कि जावा शैतान का मतलब था, आप अपना आरंभ नहीं कर रहे हैं। ग्रिड ऑब्जेक्ट।  
 आपका कोड शायद इस तरह दिखना चाहिए:  
  सार्वजनिक मण्डलीमॉडेल (अन्य महामारी मण्डल) {this.rows = other.rows; This.column = other.column; This.grid = नया (प्रकार) [this.rows] [this.column]; के लिए (int i = 0; i & lt; अन्य। आरओ; i ++) {के लिए (इंट जे = 0; जे एंड एलटी; अन्य.columns; j ++) {this.grid [i] [जे] = अन्य। ग्रिड [आई] [जे ]; }}}  
 
 जहां  प्रकार  को ग्रिड के लिए डेटाटाइप के साथ बदल दिया जाता है।

Comments

Post a Comment

Popular posts from this blog

c# - Reactive Extensions ControlScheduler -

Well, I'm using Reactive Extension Event Handler to handle my app events, I run the headlines on the Yuri thread. I also use ControlSubular for However, recently I am getting cross thread exception despite using control scheduler and I do not know what the problem is. Code: Observable.FromEventPattern & Lt; String & gt; (CC, "UiAlertMessage", New Control Session ()) Subscribe (_ = & gt; {Alert Control. (Show this language, title, _.EventArgs.UppercaseFirst ());}); The new control scheduler (this) is not to run the code on the UI control thread, so I do not get cross threading exceptions? you should do Observable.FromEventPattern & lt; String & gt; (CC, "UiAlertMessage"). AboveOption (this). Subscribe (_ = & gt; {Alert Control. (Show this language, Titles, _.EventArgs.UppercaseFirst ());}); This is the standard way of sending a scheduler related to specific controls. Passing control scheduler as you have got subsc...
Read more

scala - Play Framework - how to bind form to a session field -

Is there any way, I can get some parameters from the header, cookies (log in userId in my case) , And then apply it in a form which I know who will deposit the ticket? SupportForm supportForm: form [supportTicket] = form (mapping ("question" -> text, "priority" -> text) (apply support ticket. (HelpText.update) What are the good practices here? What is the call to apply the request, when I can use it (and also a good practice?) Edit An issue, absolutely deceiving anyone if I were to create a hidden area with this value. It could Ript, but the issue may be re-used in any way to verify and return the form, it can not be sure how it ....
Read more

javascript - Enable/Disable form elements and changing the values of button at a time? -

requirement: text is a button with "disabled" when the page opens, then I want to disable it when the user clicks on button , I want to enable my form field and at the same time I want to change the value of my button to "enabled." I have an example of how the button's value, but how can I enable / disable it at the same time? & lt; H: form & gt; Please press this button & lt; H: command button id = "cb1" value = "# {ActionBean.buttonText}" instant = "true" functionalist = "# {ActionBean.processMyAction}" /> & Lt; / H: form & gt; My Bean class looks like this: / * action listener method * / public zeroes process my action (verb phenomenon) {disable =! Disable; System.out.println ("disable:" + disabled); If (buttonText.equals ("disable")) {buttonText = "enable"; System.out.println ("Button Type:" + Button); } Else {buttonText = "disable...
Read more