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  • Why it cannot find getInputStream?

    - by Roman
    I have this code: ServerSocket serverSideSocket = new ServerSocket(1234); serverSideSocket.accept(); BufferedReader in = new BufferedReader(new InputStreamReader(serverSideSocket.getInputStream())); And compiler writes me that it cannot find "getInputStream". I do not understand why. In the beginning of my code I do import java.net.*.

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  • how to use jquery autocomplete?

    - by kyrogue
    hi, i am creating a web project using JSP, and is trying to implement a simple search for users from my database using jquery autocomplete, however i am having trouble understanding how it works. i have little to no knowledge on jquery and ajax just to let you know. i have done the following code and am stuck. <%@page contentType="text/html" pageEncoding="UTF-8" import="ewa.dbConnect,ewa.sendEmail,ewa.pwGen,ewa.hashPw,java.sql.*" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <link rel="stylesheet" type="text/css" href="css/jquery.autocomplete.css" /> <script src="js/jquery.autocomplete.js"></script> <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <input type="text" id="search" name="search"/> <script> $("#search").autocomplete("getdata.jsp"); </script> </body> </html> <%@page contentType="text/html" pageEncoding="UTF-8" import="ewa.dbConnect,java.sql.*" %> <%! dbConnect db = new dbConnect(); %> <% String query = request.getParameter("q"); db.connect(); Statement stmt = db.getConnection().createStatement(); ResultSet rs = stmt.executeQuery("SELECT username FROM created_accounts WHERE username LIKE "+query); while(rs.next()) { out.println(rs.getString("username")); } db.disconnect %> if i am not wrong i read from a website, the parameter q is default and is just there, however how do i display the data? how do i pass the values from getdata.jsp into the autocomplete?

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  • scroll/search JList when user starts typing

    - by alex
    I would like to implement one of the fanciest features I every now and then. I would like to allow a user to click on a JList and if words are typed, do a query and advance the caret to the next match (prefix). Is there and example of such an implementation in Java somewhere? I'm thinking a combination of key listeners, getNextMatch() and setSelectValue().

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  • Convert Existing Eclipse Project to Maven Project

    - by Tom G
    For a project at work, we're considering using the Maven plugin for Eclipse to automate our builds. Right now the procedure is far more complicated than it ought to be, and we're hoping that Maven will simplify things to a one-click build. My question is, is there a wizard or automatic importer for converting an existing Eclipse Java project to a Maven project, using the Maven plugin? Or should I create a new Maven project and manually copy over all source files, libs, etc.

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  • Injecting Annotated Bean into Regular Bean

    - by jboyd
    AppContext.xml <bean id="myBean" class="com.myapp.MyClass"> <property ref="myService"/> </bean> MyService.java @Service public class MyService { ... } This will throw an exception stating that no bean can be found for property "myService", which I understand because it can't be found in the context files, but I can autowire that field in other spring managed beans, but I need to explicitly build the bean in my context because the POJO is not editable in the scope of my project.

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  • NetBeans shortcut key for collapsing/expanding a method

    - by Stefanos Kargas
    JAVA - NETBEANS This is an IDE question I am always working with collapsed methods, because I want to be able to see my methods all together. This is a little time consuming because I have to use the mouse to scroll up to the declaration of the method and click on the - (minus) icon. And then respectively go to the method I want to work on and click on the + (plus) icon. Is there a way through a keyboard shortcut to do the collapse (and respectively the expand)?

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  • JPopupMenu getParent() returning a null?

    - by Zenzen
    Ok so I'm working on an Eclipse plugin based on the JGraph example. The problem is I can't really get the "save" method to work, here's how the program works in short: - I have a DiagramEditor class with an init() method, where I create a GraphEditor object and call the createFrame() methord of that object. - GraphEditor extends the BasicGraphEditor (which extends JPanel), the createFrame() method returns a JFrame and has a line "frame.setJMenuBar(menuBar)" - the "menuBar" is an object variable, which is initialized in the BasicGraphEditor. Till here everything is cool, the problem is with the action listener which is supposed to save a file. To get the graph I need to get the GraphEditor component, so I do a Component component = (Component) e.getSource() whitch is the ActionEvent passed to that action listener and at that stage is the JMenuItem "save", then I get the parent which is the JPopupMenu, then I want to get that JPopupMenu's parent which should be the GraphEdiotor, but instead I get a null. Any idea why? Here's some source code: DiagramEditor.java: @Override public void init(IEditorSite site, IEditorInput input) throws PartInitException { setSite(site); setInput(input); this.diagram = ((DiagramEditorInput)input).getDiagram(); setPartName(this.diagram.getName()); gEditor = new GraphEditor(); gEditor.createFrame().setVisible(true); } BasicGraphEditor.java: public JFrame createFrame() { JFrame frame = new JFrame(); frame.getContentPane().add(this); frame.setJMenuBar(menuBar); //frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(870, 640); return frame; } In the constructor: menuBar = new JMenuBar(); menu = new JMenu("File"); menu.setMnemonic(KeyEvent.VK_F); menuBar.add(menu); JMenuItem openMenuItem = new JMenuItem("Open", KeyEvent.VK_O); // ADD FILE OPENING //openMenuItem.addActionListener(menuListener); menu.add(openMenuItem); JMenuItem saveMenuItem = new JMenuItem("Save", new ImageIcon("/images/save.gif")); saveMenuItem.setMnemonic(KeyEvent.VK_S); saveMenuItem.addActionListener( new SaveAction(false) ); menu.add(saveMenuItem); // menu.add(new SaveAction(false)); JMenuItem saveMenuItemAs = new JMenuItem("SaveAs", new ImageIcon("/images/saveas.gif")); //saveMenuItemAs.setMnemonic(KeyEvent.VK_S); saveMenuItemAs.addActionListener( new SaveAction(true) ); menu.add(saveMenuItemAs); //menu.add(new SaveAction(true)); JMenuItem closeMenuItem = new JMenuItem("Close", KeyEvent.VK_C); closeMenuItem.addActionListener( new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } } ); menu.add(closeMenuItem);

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  • Build 1 war from two seperate web applications using ANT

    - by Pich
    Hi, Is it possible, by using ANT, to create 1 war-file out of two seperate eclipse java web application projects? Besides from just copying the right files to the right places i would have to be able two create one single web.xml. Also some other files that exists in both projects should be united into one file. Thanks Pich

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  • How to change HEX value to EBCDIC char

    - by vininet
    What is the simplest way to convert HEX value to ebcdic char type in Java e.g. The example below will return at sign but I would like to get ebcidic equivalent i.e. space char.. String hex = "40"; char c = (char) Integer.parseInt(hex, 16);

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  • JTextField only shows as a slit Using GridBagLayout, need help

    - by Bill Caffery
    Hi thank you in advance for any help, I'm trying to build a simple program to learn GUI's but when I run the code below my JTextFields all show as a slit thats not large enough for even one character. cant post an image but it would look similar to: Label [| where [| is what the text field actually looks like import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; public class lab6start implements ActionListener { JTextField custNameTxt; JTextField acctNumTxt; JTextField dateCreatedTxt; JButton checkingBtn; JButton savingsBtn; JTextField witAmountTxt; JButton withDrawBtn; JTextField depAmountTxt; JButton depositBtn; lab6start() { JFrame bankTeller = new JFrame("Welcome to Suchnsuch Bank"); bankTeller.setSize(500, 280); bankTeller.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); bankTeller.setResizable(false); bankTeller.setLayout(new GridBagLayout()); bankTeller.setBackground(Color.gray); //bankTeller.getContentPane().add(everything, BorderLayout.CENTER); GridBagConstraints c = new GridBagConstraints(); JPanel acctInfo = new JPanel(new GridBagLayout()); c.gridx = 0; c.gridy = 0; c.gridwidth = 2; c.gridheight = 1; c.insets = new Insets(5,5,5,5); bankTeller.add(acctInfo, c); c.gridwidth = 1; //labels //name acct# balance interestRate dateCreated JLabel custNameLbl = new JLabel("Name"); c.gridx = 0; c.gridy = 0; c.insets = new Insets(0,0,0,0); acctInfo.add(custNameLbl, c); custNameTxt = new JTextField("customer name",50); c.gridx = 1; c.gridy = 0; c.insets = new Insets(5,5,5,5); acctInfo.add(custNameTxt,c); custNameTxt.requestFocusInWindow(); JLabel acctNumLbl = new JLabel("Account Number"); c.gridx = 0; c.gridy = 1; c.insets = new Insets(5,5,5,5); acctInfo.add(acctNumLbl,c); acctNumTxt = new JTextField("account number"); c.gridx = 1; c.gridy = 1; c.insets = new Insets(5,5,5,5); acctInfo.add(acctNumTxt,c); JLabel dateCreatedLbl = new JLabel("Date Created"); c.gridx = 0; c.gridy = 2; c.insets = new Insets(5,5,5,5); acctInfo.add(dateCreatedLbl,c); dateCreatedTxt = new JTextField("date created"); c.gridx = 1; c.gridy = 2; c.insets = new Insets(5,5,5,5); acctInfo.add(dateCreatedTxt,c); //buttons checkingBtn = new JButton("Checking"); c.gridx = 0; c.gridy = 3; c.insets = new Insets(5,5,5,5); acctInfo.add(checkingBtn,c); savingsBtn = new JButton("Savings"); c.gridx = 1; c.gridy = 3; c.insets = new Insets(5,5,5,5); acctInfo.add(savingsBtn,c); //end of info panel JPanel withDraw = new JPanel(new GridBagLayout()); c.gridx = 0; c.gridy = 1; c.insets = new Insets(5,5,5,5); bankTeller.add(withDraw, c); witAmountTxt = new JTextField("Amount to Withdraw:"); c.gridx = 0; c.gridy = 0; c.insets = new Insets(5,5,5,5); withDraw.add(witAmountTxt,c); withDrawBtn = new JButton("Withdraw"); c.gridx = 1; c.gridy = 0; c.insets = new Insets(5,5,5,5); withDraw.add(withDrawBtn,c); //add check balance //end of withdraw panel JPanel deposit = new JPanel(new GridBagLayout()); c.gridx = 1; c.gridy = 1; c.insets = new Insets(5,5,5,5); bankTeller.add(deposit, c); depAmountTxt = new JTextField("Amount to Deposit"); c.gridx = 0; c.gridy = 0; c.insets = new Insets(5,5,5,5); deposit.add(depAmountTxt,c); depositBtn = new JButton("Deposit"); c.gridx = 1; c.gridy = 0; c.insets = new Insets(5,5,5,5); deposit.add(depositBtn,c); bankTeller.setVisible(true); // action/event checkingBtn.addActionListener(this); savingsBtn.addActionListener(this); withDrawBtn.addActionListener(this); depositBtn.addActionListener(this); } public void actionPerformed(ActionEvent e) { if (e.getSource()== checkingBtn) { witAmountTxt.requestFocusInWindow(); //checking newcheck = new checking(); } } } /* String accountType = null; accountType = JOptionPane.showInputDialog(null, "Checking or Savings?"); if (accountType.equalsIgnoreCase("checking")) { checking c_Account = new checking(); } else if (accountType.equalsIgnoreCase("savings")) { // savings s_Account = new savings(); } else { JOptionPane.showMessageDialog(null, "Invalid Selection"); } */

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  • method with two parameters which both need to be double dispatched

    - by mixm
    lets say i have a method which has two parameters. i have been implementing them as: if(aObj instance of Marble) { if(bObj instance of Bomb) { this.resolve((Marble)aObj,(Bomb)bObj); } } as you can see its not a very pretty solution. i plan to implement using double dispatching, but with two parameters which both need double dispatching, im afraid im a bit stumped. any ideas please. im implementing in java btw.

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  • Web services that implement the same interface

    - by zachary
    My friend build a web service in java I build one in .net I want them to implement the same interface then in my program change the web.config to point to one or the other. In my mind this would be done by implementing the same interface. Not sure how it would actually be done...

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  • Why is go language so slow?

    - by oraz
    As we can see from The Computer Language Benchmarks Game: go is in average 10x slower then C go is 3x slower then Java !? How it can be bearing in mind that go compiler produces native code for execution? Immature compilers for go? Or there is some intrinsic problem with the go language?

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  • Iterating Collection In Two Threads

    - by ChloeRadshaw
    This question relates both to C# and Java If you have a collection which is not modified and that collection reference is shared between two threads what happens when you iterate on each thread?? ThreadA: Collection.iterator ThreadA: Collection.moveNext ThreadB: Collection.iterator ThreadB: Collection.moveNext Will threadB see the first element? Is the iterator always reset when it is requested? What happens if this is interleaved so movenext and item is interleaved? Is there a danger that you dont process all elements??

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  • JBoss warning - "Unable to fill pool"

    - by Marcus
    We're getting this random warning from JBoss.. any idea why? It happens at random times when there are no active threads. Everything works when any processing resumes. 13:49:31,764 WARN [JBossManagedConnectionPool] [ ] Unable to fill pool org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: Listener ref used the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack The Connection descriptor used by the client was: //localhost:1521/orcl

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  • HttpURLConnection does not read the whole respnse

    - by Peter Szanto
    I use HttpURLConnection to do HTTP POST but I dont always get back the full response. I wanted to debug the problem, but when I step through each line it worked. I thought it must be a timing issue so I added Thread.sleep and it really made my code work, but this is only a temporary workaround. I wonder why is this happening and how to solve. Here is my code: URL u = new URL(url); URLConnection c = u.openConnection(); InputStream in = null; String mediaType = null; if (c instanceof HttpURLConnection) { //c.setConnectTimeout(1000000); //c.setReadTimeout(1000000); HttpURLConnection h = (HttpURLConnection)c; h.setRequestMethod("POST"); //h.setChunkedStreamingMode(-1); setAccept(h, expectedMimeType); h.setRequestProperty("Content-Type", inputMimeType); for(String key: httpHeaders.keySet()) { h.setRequestProperty(key, httpHeaders.get(key)); if (logger.isDebugEnabled()) { logger.debug("Request property key : " + key + " / value : " + httpHeaders.get(key)); } } h.setDoOutput(true); h.connect(); OutputStream out = h.getOutputStream(); out.write(input.getBytes()); out.close(); mediaType = h.getContentType(); logger.debug(" ------------------ sleep ------------------ START"); try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } logger.debug(" ------------------ sleep ------------------ END"); if (h.getResponseCode() < 400) { in = h.getInputStream(); } else { in = h.getErrorStream(); } It genearates the following HTTP headers POST /emailauthentication/ HTTP/1.1 Accept: application/xml Content-Type: application/xml Authorization: OAuth oauth_consumer_key="b465472b-d872-42b9-030e-4e74b9b60e39",oauth_nonce="YnDb5eepuLm%2Fbs",oauth_signature="dbN%2FWeWs2G00mk%2BX6uIi3thJxlM%3D", oauth_signature_method="HMAC-SHA1", oauth_timestamp="1276524919", oauth_token="", oauth_version="1.0" User-Agent: Java/1.6.0_20 Host: test:6580 Connection: keep-alive Content-Length: 1107 In other posts it was suggested to turn off keep-alive by using the http.keepAlive=false system property, I tried that and the headers changed to POST /emailauthentication/ HTTP/1.1 Accept: application/xml Content-Type: application/xml Authorization: OAuth oauth_consumer_key="b465472b-d872-42b9-030e-4e74b9b60e39", oauth_nonce="Eaiezrj6X4Ttt0", oauth_signature="ND9fAdZMqbYPR2j%2FXUCZmI90rSI%3D", oauth_signature_method="HMAC-SHA1", oauth_timestamp="1276526608", oauth_token="", oauth_version="1.0" User-Agent: Java/1.6.0_20 Host: test:6580 Connection: close Content-Length: 1107 the Connection header is "close" but I still cannot read the whole response. Any idea what do I do wrong?

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