Init () method v not found

Question

I am rewriting the applet that I have, but when it loads it, I get an exception at runtime. The exception is

Exception in thread "main" java.lang.NoSuchMethodError: ClientSettings: method < init>()V not found at RunClient.<init>(RunClient.java:41) at RunClient.main(RunClient.java:63) 

Here is the RunClient:

 import java.applet.Applet; import java.awt.BorderLayout; import java.awt.Container; import java.awt.Desktop; import java.awt.Dimension; import java.awt.Rectangle; import java.awt.Robot; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import java.io.File; import java.io.FilenameFilter; import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; import java.net.URL; import java.util.Properties; import javax.imageio.ImageIO; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPopupMenu; import javax.swing.JSeparator; public class RunClient extends Applet implements ActionListener { private Robot robot; private static final long serialVersionUID = 1L; public static Properties params = new Properties(); public JFrame mainFrame; public JPanel mainPane = new JPanel(); public static String[] data; public String mainurl = getParameter("ip"); public int lang = 0; public String frameName = getParameter("servername"); public JPanel totalPanel; private JMenuBar menuBar = new JMenuBar(); private int capNum; private FilenameFilter filter = new FilenameFilter() { @Override public boolean accept(File arg0, String arg1) { if (arg0.getName().equals("images") && arg1.endsWith("png")) { return true; } return false; } }; public static final Object[][] JMENU_BUTTONS = new Object[][]{{"File", new JMenuItem("New Client"), new JSeparator(), new JMenuItem("Exit")}, {"Guides", new JMenuItem("Getting Started"), new JMenuItem("Fighting Monsters"), new JMenuItem("Money Making")}, {"Links", new JMenuItem("Wiki"), new JMenuItem("Forums"), new JMenuItem("Youtube"), new JMenuItem("Donate")}, {"Tools", new JMenuItem("Take a screenshot")}}; public String[] getLoaderParameters() { return new String[]{getParameter("servername"), getParameter("ip"), getParameter("port")}; } public static void main(String[] strings) { data = getLoaderParameters(); new ClientSettings(data); RunClient runclient = new RunClient(); runclient.doFrame(); } public RunClient() { try { loadCaptureAmts(); robot = new Robot(); } catch(Exception e) { e.printStackTrace(); } } private void loadCaptureAmts() { capNum = new File("./images/").listFiles(filter).length; } public void init() { doApplet(); } void doApplet() { try { readVars(); startClient(); } catch (Exception exception) { exception.printStackTrace(); } } public void doFrame() { try { readVars(); openFrame(); startClient(); } catch (Exception exception) { exception.printStackTrace(); } } public void readVars() throws IOException { params.put("cabbase", "g.cab"); params.put("java_arguments", "-Xmx1024m -Dsun.java2d.noddraw=true"); params.put("colourid", "0"); params.put("worldid", "16"); params.put("lobbyid", "15"); params.put("demoid", "0"); params.put("demoaddress", ""); params.put("modewhere", "0"); params.put("modewhat", "0"); params.put("lang", "0"); params.put("objecttag", "0"); params.put("js", "1"); params.put("game", "0"); params.put("affid", "0"); params.put("advert", "1"); params.put("settings", "wwGlrZHF5gJcZl7tf7KSRh0MZLhiU0gI0xDX6DwZ-Qk"); params.put("country", "0"); params.put("haveie6", "0"); params.put("havefirefox", "1"); params.put("cookieprefix", ""); params.put("cookiehost", "127.0.0.1"); params.put("cachesubdirid", "0"); params.put("crashurl", ""); params.put("unsignedurl", ""); params.put("sitesettings_member", "1"); params.put("frombilling", "false"); params.put("sskey", ""); params.put("force64mb", "false"); params.put("worldflags", "8"); params.put("lobbyaddress", mainurl); } public void openFrame() { JPopupMenu.setDefaultLightWeightPopupEnabled(false); mainPane.setLayout(new BorderLayout()); mainPane.add(this); mainPane.setPreferredSize(new Dimension(765, 503)); totalPanel = new JPanel(); totalPanel.setPreferredSize(new Dimension(765, 503)); totalPanel.setLayout(new BorderLayout()); totalPanel.add(mainPane, BorderLayout.CENTER); mainFrame = new JFrame(frameName); mainFrame.setLayout(new BorderLayout()); mainFrame.getContentPane().add(totalPanel, BorderLayout.CENTER); mainFrame.setDefaultCloseOperation(3); //setMenuBar(); mainFrame.pack(); mainFrame.setVisible(true); } private void setMenuBar() { int id = 0; for (int y = 0; y < JMENU_BUTTONS.length; y++) { JMenu menu = new JMenu(); for (int i = 0; i < JMENU_BUTTONS[y].length; i++) { if (i == 0) { menu.setText((String) JMENU_BUTTONS[y][i]); } else if (JMENU_BUTTONS[y][i] instanceof JMenuItem){ JMenuItem item = (JMenuItem) JMENU_BUTTONS[y][i]; menu.add(item); item.setActionCommand(""+ id++); item.addActionListener(this); } else { menu.add((JSeparator) JMENU_BUTTONS[y][i]); } } menuBar.add(menu); } mainFrame.setJMenuBar(menuBar); } public void startClient() { try { //RuntimeLoader loader = new RuntimeLoader(); //Class clientclass = loader.loadClass("client"); //Applet clientApplet = (Applet) clientclass.newInstance(); //clientclass.getMethod("provideLoaderApplet", // new Class[] { java.applet.Applet.class }).invoke(null, // new Object[] { this }); //clientApplet.init(); //clientApplet.start(); client.provideLoaderApplet(this); client var_client = new client(); var_client.init(); var_client.start(); } catch (Exception exception) { exception.printStackTrace(); } } public URL getDocumentBase() { return getCodeBase(); } public URL getCodeBase() { URL url; try { url = new URL(new StringBuilder().append("http://").append(mainurl) .toString()); } catch (Exception exception) { exception.printStackTrace(); return null; } return url; } @Override public void actionPerformed(ActionEvent e) { switch (Integer.parseInt(e.getActionCommand())) { case 1: if (JOptionPane.showConfirmDialog(this, "Are you sure you want to quit?") == 0) System.exit(0); break; case 2: browse("http://dementhium.wikia.com/wiki/Getting_Started"); break; case 3: browse("http://forums.dementhium.com/showthread.php?t=143"); break; case 4: browse("http://dementhium.wikia.com/wiki/Dementhium_Wiki"); break; case 5: browse("http://dementhium.wikia.com/wiki/Dementhium_Wiki"); break; case 6: browse("http://forums.dementhium.com/"); break; case 7: browse("http://www.youtube.com/DementhiumOfficial"); break; case 8: browse("http://forums.dementhium.com/payments.php"); break; case 9: writeImage(robot.createScreenCapture(getGameScreenRectangle())); break; default: System.out.println(Integer.parseInt(e.getActionCommand())); } } private Rectangle getGameScreenRectangle() { Rectangle rect = getBounds(); rect.setLocation(this.getLocationOnScreen()); return rect; } private void writeImage(BufferedImage createScreenCapture) { try { ImageIO.write(createScreenCapture, "PNG", new File("./images/capture-" + capNum++ + ".png")); } catch (IOException e) { e.printStackTrace(); } } private void browse(String string) { if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.BROWSE)) { try { Desktop.getDesktop().browse(new URI(string)); } catch (IOException e1) { e1.printStackTrace(); } catch (URISyntaxException e1) { e1.printStackTrace(); } } } } 

and here ClientSettings.java, it is called from different files, args is always determined using

 public String[] data; 

in runclient

 public class ClientSettings { public int PORT; public String IPADDRESS; public String SERVERNAME; public ClientSettings(String[] args) { PORT = Integer.parseInt(args[2]); IPADDRESS = args[1]; SERVERNAME = args[0]; } } 

Answer 1

Line 41 of RunClient looks for a default constructor on ClientSettings that does not exist. You have defined a constructor that accepts String[] , so no default constructor is created. It seems that the code you posted does not work, because it seems to show the correct constructor call.

Answer 2

I had the same problem, but when writing unit tests. The test failed with this exception when creating the object I wanted to test. I added a new constructor to the class that I tested, and it seems to me that I'm running old code that did not have this constructor. Cleaning up and restoring the workspace (with Maven) solved this for me.