Out.println()

hi,
It is possible to use out.println() in jsf backing bean mean in .java file if yes then how.

I don't understand you. I still don't see a valid argument to use out.print() in a backing bean.
At least, to output stuff from the bean in JSF, you should be using the h:outputText.

Similar Messages

  • How to dynamically generate HTML in Servlet without all the out.println?

    Since I am not sure whether this is a Java Servlet or JSP problem, so I will describe my situation. And hopefully someone can propose a good solution. I came from a PHP, so Java Servlet and JSP are still a little bit foreign for me.
    My problem
    My front end is a JSP page that essentially contains a form (let’s call it form1). The reason it is a JSP not a HTML is because I will need to load form data from the backend and display them in the form. Once the user submits the form, it will go to a backend Java Servlet (let’s call it servlet 1), which loads data from files according to user input. Then, I will need to dynamically create a new form (let’s call it form2) based on the data loaded from files. Once the user inputs and submits form2, another Java Servlet (servlet 2) will do more processing. That is the end of line. Both form1 and form2 require Javascript.
    My question is that since servlet 1 will need to dynamically create form2. I naturally will want a presentation control. Instead of doing out.println(“html code”), I want to use JSP and write direct HTML code. On the other hand, can JSP be used as a form action? So basically, in form 1, can I do <form action=”…/xxx.jsp”> I think I saw something like this, but I lack the comprehensive JSP knowledge to know for sure. More importantly, if hypothetically JSP can be used, how do I handle functions such as doGet(HttpServletRequest request, HttpServletResponse response), which is used in servlet1.
    Thank you,
    M

    no, servlets should not be used to generate a view, that is what a JSP is for. So let your backend servlet fetch the data, put it for example as attributes of the request scope (request.setAttribute()) and then forward control to a JSP that will generate the view, based on the information you stored in the request scope. That is the proper way of using servlets & JSPs; use servlets to invoke business logic classes, use JSPs combined with JSTL to generate the view. If you do it properly, you don't need ANY java code in your JSP.

  • Is there a way to make system.out.println() scroll down as it goes?

    I am writing a program where I want to be able to read what's printed out in the console of my IDE through System.out.println() as the program runs/after the program runs. However, right now I run the program, the message prints out, and then when I go to read it the scroll bar is all the way up so I can see only the top of the print-out (the first thing printed out). Is there any way I can get the console to scroll along with the text, kind of like floating boxes you see on various websites for various reasons? In other words, can I get it so that when I look in the console at any given moment of the program running, I am looking at the newest text printed out (the text at the bottom of the "page")? Thank you!

    That would be an IDE problem and not a Java one. You could redirect output into a text file so you can read at your leisure and scroll up and down as much as you like.

  • Is there a way to force System.out.println to run when called

    I working on my first threaded program and having a hard time debugging. I've used System.out.println to let me know what's going on but due (I assume) to the nature of threads the output is not sequential. Is there a way to force println to execute immediatly so that they show up in the order they were called?
    Thanks --- Mike

    mjs1138 wrote:
    endasil, Thanks for the reply. I'm currenlty running the program from within the NetBeans IDE. It is the output displayed by in NetBeans "output" that I'm looking at.
    --- MikeI don't use Netbeans, but I would guess that it too pipes Standard Out and Standard Error to the same console. You didn't address my comment. Are you printing to System.err as well? This happens implicitly if you use Exception.printStackTrace(), for example.

  • 32-bit JDK 7 System.out.println not working in IDE

    Hi folks,
    I have a 64-bit Windows 7 OS.
    Due to 3rd party library/jar dependencies, i had to install the 32-bit Java JDK 1.7 and Eclipse IDE.
    I also installed NetBeans.
    So i have a 64-bit OS and am running 32-bit Java JDK/JRE & IDEs.
    The problem I am having is that my program's System.out.println("...") statements are not outputting strings to either IDE debug console.
    Executing the compiled program from a command line/prompt produces the expected string output.
    The basic "Hello, World" program is enough to cause this behaviour to start occurring.
    I have not manually / intentionally changed any IDE-specific Debug Console or Windows environment settings.
    One caveat: This same environment has worked successfully in the past ?! Yes, this is one of those "..it worked last week & yesterday and today it isn't and i swear i didn't do anything..." issue.
    Thoughts ?

    Thanks for the reply.
    The 64-bit versions of Java & Eclipse were installed first.
    When i discovered I had to use the 32-bit versions, i un-installed the 64-bit ones & installed the 32-bits.
    Even after that initial un-install 64-bit/install 32-bit process, it was working.
    I have also been installing the Windows 7 64-bit OS updates when i am informed of them.
    I'm not sure if any of these would affect how the Eclipse / NetBeans IDEs behave.
    Behaviour has been inconsistent.
    Initially it was always working.
    But over the past several days, it has been working less and less.
    I don't have any large data structures.
    This isn't a large complicated program, couple hundred lines, so i highly doubt that i'm doing anything to the resources, but something has changed.
    The main project I am working on takes command line parameters, does some initial processing, produces output using System.out.printlns [SOP] then depending on the parameters, branches into 2 different processing paths, let's call them A & B. Each of these processing paths also use SOPs. When i run the program in the IDE going thru path A, sometimes the initial SOP statements will work and the SOP statements specific to path A will also work. If i immediately change the parameters to go thru path B & re-run it, not even the initial SOP statements before the branching decision work.
    I've tried doing System.flush()s too - no affect.
    I haven't tried the re-direction option to a file option you mentioned yet.
    It always works from a command prompt - that is telling me that the Java SOPs are working properly, correct ?
    Inside an Eclipse or NetBeans IDE, SOP output to the debug console is inconsistent.
    Running from a command prompt, the SOPs always work.
    It'd help to know if this an IDE issue, a Java issue, a Windows 7 issue so i can narrow down where to try and correct the situation.
    I have a Windows XP VM set up, i'll try running the program there and see if there's a difference.
    Thanks for your reply.

  • How can i put a system.out.println into txt file

    i want to generate a txt file instead of system.out.println. for the output How can i do that and what code can i use for that??
    Edited by: crystalarun on Oct 14, 2007 11:40 AM

    suppose u ant output in "Output.txt"
    then code can be
    PrintStream out = new PrintStream(new FileOutputStream("Output.txt"));
    System.setOut(out)

  • System.out.println () is not working properly

    Hi, Why does this happens:
    Object temp=null;
    System.out.println ("temp is null? "+temp==null);
    just prints: true
    expected: temp is null? true
    Why does this happens????
    If I do System.out.println ("temp is null? "+(temp==null)); it works bu it should work without the pharentesis too

    MelGohan wrote:
    Hi, Why does this happens:
    Object temp=null;
    System.out.println ("temp is null? "+temp==null);
    just prints: trueThat is odd, mine prints "false".
    type Test126.java
    public class Test126 {
        public static void main(String[] args) {
            Object temp=null;
            System.out.println ("temp is null? "+temp);
            System.out.println ("temp is null? "+temp==null);
    }javac Test126.java
    java Test126
    temp is null? null
    false

  • Out.println() problems with large amount of data in jsp page

    I have this kind of code in my jsp page:
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    out.println(myText); // size of myText is about 300 kbThe problem is that I manage to print the whole text only sometimes. Very often happens such that the receiving page gets only the first 40 kb and then the printing stops.
    I have made such tests that I split the myText to smaller parts and out.print() them one by one:
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    Well, there are many ways you could do this, but it depends on what you are looking for.
    For instance, generating an Excel Spreadsheet could be quite easy:
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                    out.println("3\t1\t5\t7");
                    out.println("2\t9\t3\t3");
              out.flush();
              out.close();
    }Just try this simple code, it works just fine... I used the same approach to generate a report of 30000 rows and 40 cols (more or less 5MB), so it should do the job for you.
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  • In a JSP having a problem using out.println in method

    I am trying to update a field on a form using JAVASCRIPT generated by JSP. The following code works fine when in the main body of the code.
    The field tota on form mainform is updated based on the contents of strTest.
    out.println("<SCRIPT LANGUAGE='JavaScript'>")
    out.println("document.mainform.tota.value = " + strTest);
    out.println("document.mainform.tota.focus()");
    out.println("</SCRIPT>");
    But if you have 10 flds that you want updated, it would be nice NOT to have to use 40 lines of code to do it. I am trying to build a method that will accept a field name and some data to put in a form field. I started small and just wanted to update 1 fld using the method below:
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    out.println("document.mainform.tota.focus()");
    out.println("</SCRIPT>");
    %>
    I keep getting the error:
    Time_Entry_jsp.java:21: cannot resolve symbol
    symbol : variable out
    location: class org.apache.jsp.Time_Entry_jsp
    out.println("");
    ^
    Help.....

    try this:
    <%@ page import="java.io.*" %>
    <%!
    //Declare method to update form fields
    public void Update_Frm_Fld(HttpServletResponse response)
         throws ServletException, IOException{
              PrintWriter out=response.getWriter();
              out.println("<SCRIPT LANGUAGE='JavaScript'>");
              out.println("document.mainform.tota.value = "+1);
              out.println("document.mainform.tota.focus()");
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    %>and when you call the function use this:
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  • System.out.println in Web Dynpro Java

    I call System.out.println in some components in web dynpro java.  But I cannot find the standard console output file of SAP J2EE Engine. Anyone know where is the location of standard output file?

    Thanks Deepak. Your link blog is working.
    Sreeni: I cannot find a start-up log file. Could you please tell me the real path?
    Edited by: Nuttakorn Boonthamtanarung on Apr 1, 2010 6:58 AM

  • System.out.println not working in Tomcat-4.1.x

    System.out.println not working in Tomcat-4.1.24. Any settings has to be enabled??? I am using tomcat for Solaris

    I think u can use ServletContext.log() to output info instased.

  • Where to see the System.out.println() messages

    I deploy my application in Oracle9ias . I have some System.out.println() statements in java class files.
    When I run the application I need to know where I can see those println() statements.

    The Member Feedback forum is for suggestions and feedback for OTN Developer Services. This forum is not monitored by Oracle support or product teams and so Oracle product and technology related questions will not be answered. We recommend that you post this thread to the Application Server-General forum. The URL is:
    Oracle Application Server - General

  • Where to see the System.out.println statements on soa server.

    Hi,
    I have generated some proxy classes in my jdeveloper. And I have deployed that project to the admin server on my soa_domain.
    Now my java files have some System.out.println statements. I want to see those values.
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    What s the file name where i can see.
    do i have to enable some debigging on the server. if yes then for what level i need to enable the log at what level.
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    Anoop

    Hi,
    System.out.println is not really a good way to debug in weblogic... If you didn't configure where the stdout will go those messages can end up going nowhere...
    I suggest you use one of these...
    This will go to the soa*diagnostic logs... for example DOMAIN_HOME/servers/soa_server1/soa_server1-diagnostic.log...
    import java.util.logging.Level;
    import java.util.logging.Logger;
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        private static final Logger soa_logger = Logger.getLogger("oracle.soa.Logger");
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            soa_logger.log(Level.INFO, message);
            soa_logger.log(Level.INFO, message, t);or
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            weblogic_logger.notice(message, t);Usually info and notice will go to the logs by default, you can try with higher levels (error,warning) as well or you can tweek the server debug level to use lower levels...
    Cheers,
    Vlad

  • How to embed html tags in out.println

    Hi,
    i have the following code in a function in java which passes the JspWriter object
    out.println("<table>");
              out.println("<tr>");
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              out.println("<td>Pack Purchased </td>");
              out.println("<td>Sms Used</td>");
              out.println("<td>Sms Left</td>");
              out.println("<td>New User</td>");
    out.println("</tr></table>");is what i'm doing rite? plz help.

    Hi,
    i' having a problem with the following code.
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              out.print("<td>Pack Purchased </td><td>Sms Used</td>");
              out.print("<td>Sms Left</td><td>New User</td>");
              out.print("</tr>");
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                 intBasicPacksTotalCount += objUserDetails.CountBasicPacks;
                 intAdvancedPacksTotalCount += objUserDetails.CountAdvancedPacks;
                 int intCurrentUserSoldSmsCount = getSoldSmsCountToUser(objUserDetails);
                 intTotalSoldSmsCount = intTotalSoldSmsCount + intCurrentUserSoldSmsCount;
                 int intCurrentUserUtilizedSmsCount = intCurrentUserSoldSmsCount - objUserDetails.SmsBalance;
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                 intActivePacksCount += getUserActiveSMSPacksCount(objUserDetails, intCurrentUserUtilizedSmsCount);           
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                boolean newFlag=NewUser(objUserDetails);
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  • System.out.println - Hello World Example

    Hi All
    I am using Apache Tomcat and trying t produce a simple output to the browser. Cannot get System.out.println to work. See code and out below:
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    many thanks
    Naresh

    System.out prints to System.out. What that is depends:
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    You can change in Java what System.out prints to, but you don't often do this. But in JSP it doesn't print to the browser. JSP is not CGI, which does you the standard out as the destination for written data.

  • Redirect system.out.println() to a file

    hi all,
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    thanks in advance
    Sojan

    Actually,System.setOut(new PrintStream(new FileOutputStream("output.txt"), true));
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