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  • two dimensional array [closed]

    - by Baiba
    Can someone please write to me source code in Java? I have a task: create a program, that contains two dimensional array (with numbers) and the programm needs to sum zeros in each column and then get out the number of column in which the zeros are least.. thanks!

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  • Plotter: What is fixed - the height or the width

    - by Jayan
    I am fixing some printing (plotter) problems in our java code(windows 32). The paper is 50 meter roll , loaded on to plotter. The paper It 36 inch "wide". I am printing image 36inch by 108 inch. When I print what is with height and width I can use? [ FYI. The testing is done using print to file, No paper is wasted :) ] Thanks, Jayan

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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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  • instantiate spring bean via factory method

    - by Don
    Hi, I need to instantiate a Spring bean in the same manner as this Java code: MyClass foo = Mockito.mock(MyClass.class); The XML I need will look something like: <bean id="foo" class="Mockito" factory-method="mock"> <constructor-arg value="MyClass"/> </bean> I can't seem to find the correct syntax for passing a Class object as a parameter to the factory method. Thanks, Don

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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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  • 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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  • NoClassDefFoundError when running Netbeans 6.8 application

    - by Malachi
    My application has recently started throwing NoClassDefFoundError errors when I am running my application from within NetBeans. It never used to do this. And when I run this outside of NetBeans using the command line argument that it provides once built, these errors are not produced Is this a bug with Netbeans? I have reinstalled NetBeans as I recently had another that was resolved by reinstalling, however the problem still persists. http://stackoverflow.com/questions/2654892/symbol-error-in-java-application-using-netbeans-6-8-when-adding-a-shared-project Within Netbeans Outside NetBeans

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  • How does volatile actually work?

    - by FredOverflow
    Marking a variable as volatile in Java ensures that every thread sees the value that was last written to it instead of some stale value. I was wondering how this is actually achieved. Does the JVM emit special instructions that flush the CPU cashes or something?

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  • Productivity research material

    - by Rune FS
    While debating which platform to use for what applications (specifically we debated c++, java, c# and f#) we tried finding scientific quality research on productivity (cost of ownership really) of similar applications build on various platforms/using the above mentioned languages. Any one know of such research?

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  • "Cannot find symbol" problem.

    - by joseph
    I'm getting the Cannot find symbol error from my code. Does anyone know what can cause this problem? // Register JDBC driver Class.forName("net.sourceforge.jtds.jdbc.Driver"); method forName(java.Lang.String) Class.forName("net.sourceforge.jtds.jdbc.Driver); ^

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  • VB6's private static in C# ?

    - by blez
    In VB6 there are local static variables that keep their values after the exit of procedure. It's like using public vars but on local block. For example: sub count() static x as integer x = x + 1 end sub After 10 calls, x will be 10. I tried to search the same thing in .NET (and even Java) but there was none. Why? Does it break the OOP model in some way, and is there a way to emulate that.

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  • Are Maybes a good pattern for scala?

    - by Fred Haslam
    For a while I have been struggling to integrate scala with java methods that might return null. I came up with the following utility which helps a lot: // produce an Option, nulls become None object Maybe { def apply[T](t:T) = if (t==null) None else Some(t) } Maybe(javaClass.getResultCouldBeNull()).map( result => doSomeWork(result) ) I have a few questions about this solution: Is there a better or more standard pattern to use? Am I duplicating something that already exists? Does this functionality have hidden gotchas?

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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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  • Reading all compile errors in Windows command-line?

    - by ArdillaRoja
    Noob question, apologies. I'm compiling Java in Windows Vista's command-line and have so many syntax errors that some are being pushed off the top (a lot of 'class, interface or enum expected' errors which leads me to believe it's an obvious syntax mistake early on in the code that I can't spot). Does anyone know how I could get it to display those first errors? Thanks in advance for the help.

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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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