Home > Cannot Instantiate > Internal Error Cannot Instantiate At Anonymous Actionlistener To

Internal Error Cannot Instantiate At Anonymous Actionlistener To

here for a quick overview of the site Help Center Detailed answers to any questions cannot instantiate the type you might have Meta Discuss the workings and policies of this java actionlistener site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up cannot instantiate type actionlistener? up vote 3 down vote favorite import org.jsoup.Jsoup; @SuppressWarnings("unused") public class SimpleWebCrawler extends JFrame implements ActionListener { JTextField yourInputField = new JTextField(20); static JTextArea _resultArea = new JTextArea(200, 200); JScrollPane scrollingArea = new JScrollPane(_resultArea); private final static String newline = "\n"; JButton jButton = new JButton("Send Text"); public SimpleWebCrawler() throws MalformedURLException { yourInputField.addActionListener(new ActionListener()); class MyActionListener implements ActionListener { public void actionPerformed(ActionEvent evt) { JTextField textfield = (JTextField)evt.getSource(); process(textfield.getText()); } } String word2 = yourInputField.getText(); _resultArea.setEditable(false); try { URL my_url = new URL("http://" + word2 + "/"); BufferedReader br = new BufferedReader(new InputStreamReader( my_url.openStream())); String strTemp = ""; while (null != (strTemp = br.readLine())) { _resultArea.append(strTemp + newline); } } catch (Exception ex) { ex.printStackTrace(); } _resultArea.append("\n"); _resultArea.append("\n"); _resultArea.append("\n"); String url = "http://" + word2 + "/"; print("Fetching %s...", url); try{ Document doc = Jsoup.connect(url).get(); Elements links = doc.select("a[href]"); System.out.println("\n"); BufferedWriter bw = new BufferedWriter(new FileWriter("C:\\Users\\user\\fypworkspace\\FYP\\Link\\abc.txt")); _resultArea.append("\n"); for (Element link : links) { print(" %s ", link.attr("abs:href"), trim(link.text(), 35)); bw.write(link.attr("abs:href")); bw.write(System.getProperty("line.separator")); } bw.flush(); bw.close(); } catch (IOException e1) { } JPanel content = new JPanel(); content.setLayout(new BorderLayout()); content.add(scrollingArea, BorderLayout.CENTER); content.add(yourInputField,BorderLayout.SOUTH); content.add(jButton, BorderLayout.EAST); this.setContentPane(content); this.setTitle("Crawled Links"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.pack(); }

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign http://stackoverflow.com/questions/5525302/cannot-instantiate-type-actionlistener up How can you instantiate an Interface? up vote 0 down vote favorite In Swing I'm using ActionListener or any other Listener interface. In general I can't create object of Interface. If I use new operator with any constructor name a object is created. I have a problem with my code below: jbtOK : is some button object ActionListener is an interface. How http://stackoverflow.com/questions/8163754/how-can-you-instantiate-an-interface can I use new ActionListener() in addActionListener method? Since an object is created. but, I can't create a object from an interface. Is it only possible in inner classes? i.e, in inner classes I can create objects of interface: jbtOK.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.out.println("hi"); } }); java swing interface awt actionlistener share|improve this question edited Nov 17 '11 at 9:34 tobiasbayer 7,10732961 asked Nov 17 '11 at 7:54 sri 29123 4 this is a question, without any research –Kowser Nov 17 '11 at 7:59 1 This is not a bad question. It is just badly formulated. sri asks "How can you instantiate an Interface? We have learned that Interfaces are not Classes!" –Costis Aivalis Nov 17 '11 at 8:14 Good question for beginners, everyone has a first time! However, it's a good practice research before ask here... –Charliemops Nov 17 '11 at 8:50 add a comment| 3 Answers 3 active oldest votes up vote 3 down vote with the new keyword you create the object into the memory and as you create the object object of an interface it

details. Win a copy of Penetration Testing Basics this week in the Security forum! Post Reply Bookmark https://coderanch.com/t/596338/GUI/java/actionlisteners-button Topic Watch Topic New Topic programming forums Java Java JSRs Mobile Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Swing / AWT / SWT Help with actionlisteners on a button. John Corkrend Ranch Hand Posts: 51 I like... posted 3 years ago cannot instantiate I am a new programmer and not quite sure what to do to register a button click, i know about action listeners but they dont make much sense the way some the oracle website explains it. Below is my code. package data; import javax.swing.*; import java.awt.*; import java.awt.event.ActionListener; public class DataApplication internal error cannot extends JFrame { //Set up row 1 JPanel row1 = new JPanel(); JLabel instruct = new JLabel("Enter the following information in the fields below"); //Set up row 2 JPanel row2 = new JPanel(); JLabel name = new JLabel("First Name: "); JTextField firstName = new JTextField(); //set up row 3 JPanel row3 = new JPanel(); JLabel lastname = new JLabel("Last Name: "); JTextField lastName = new JTextField(); //set up row 4 JPanel row4 = new JPanel(); JLabel email = new JLabel("Email:"); JTextField emailEntry = new JTextField(); //set up row 5 JPanel row5 = new JPanel(); JLabel username = new JLabel("UserName"); JTextField nameEntry = new JTextField(); //set up row 6 JPanel row6 = new JPanel(); JButton done = new JButton("Done"); public DataApplication() { super ("Application"); setSize (300,320); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); GridLayout baselayout = new GridLayout(6,1,1,1); setLayout(baselayout); GridLayout layout = new GridLayout(1,1); row1.setLayout(layout); row1.add(instruct); add(row1); row2.setLayout(layout); row2.add(name); row2.add(firstName); add(row2); row3.setLayout(layout); row3.add(lastname); row3.add(lastName); add(row3); row4.setLayout(layout); row4

 

java error cannot instantiate the type list

Java Error Cannot Instantiate The Type List p here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the java instantiate list with values company Business Learn more about hiring developers or posting ads with us Stack Overflow cannot instantiate the type in java Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of cannot instantiate the type arraylist million programmers just like you helping