Durgaprasad

Runtime.exec() method is used to run the process( exe files).
For example call Runtime.exec("notepad") and see the results.

Even i dont know how to pass arguments to the servlet

the sequesnce is

firstly, service(ServletRequest,ServletRespone) will be called which in turn calls service(HttpServletRequest,HttpServletResponse) which based on the type of the method(Get,Post etc..) will call the appropriate doXXX() method

when you first make a request to the protected resource, the container will not be knowing whether it is protected or not. Once it comes to know that the requested resource is protected (by looking at the DD), it will send the response asking for the username and password. So if you type the url directly that means you are requesting for that page itself, which will not be served by the container at any cost

There is something called dynamic dispatcher in the JVM.
In computer science, dynamic dispatch is the process of mapping a message to a specific sequence of code (method) at runtime. This is done to support the cases where the appropriate method cannot be determined at compile-time (i.e. statically). Dynamic dispatch is only used for code invocation and not for other binding processes (such as for global variables) and the name is normally only used to describe a language feature where a runtime decision is required to determine which code to invoke.

Further java uses pointers to adopt dynamic dispatcher.
Each instance will have pointer to the methods and JVM maintains a table to map the objects and the methods

you can use the folowing code in the jsp

if(request.getParameterValues()!=null){
for(int i=0;i<request.getParameterValues().length;i++){
<input type=checkbox name="somename" if(request.getParameterValues()!=null)checked>

}
}

syntax and indentatins are not correct.
Hope uu can managae

HOpe the following code will help you

//parser.parse(new File(filename), handler);
DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
builderFactory.setValidating(true);
DocumentBuilder builder =builderFactory.newDocumentBuilder();

builder.setErrorHandler(new MyErrorHandler());
Document document = builder.parse(new File("books.xml"));

In your servlet you can either call getServletOutputStream() or getWriter() method on the response object. You cant call both.
Since your jsp is also a servlet, and getWriter() will be automatically called by the container to provide you out implicit valriable. So you cant call getServletOutputStrem() in JSP. And using your out variable you cant send any binary data. So you cant process images in your JSP

Yeah it will be better if you instantiate it in the context listener.
Another better solution is you need not have to instantiate the class. You can have static method which serves you the connection Object. Further you can go for singleton pattern if you want to have only one connection

Hi all,
I cleared SCWCD with 86%. This was after i scored 91% in SCJP.
I just want to know is this good marks? can anyone just tell me wen will sun update the certification progress and do they give me logo for this also?
thanks in advance

I assume you are using HttpRequest, HttpResponse in your service method.

use the following code

Cookie cookie = new Cookie("name","value"); response.addCookie(cookie);
to create a new cookie and store it in the client machine.

the life time of the cookie on the server machine depends on the age you set

cookie.setMaxAge(int age) [/code/ to retrieve the cooki for the request do the following [code] Cookie[] cookies = request.getKookies(); [/code/] loop through the array and use the [code] getName() and getValue() methods on the cookie object to retrive the cookie

I hope this will help you

scjp 91
scwcd perparing
Isdx preparing

There is no need to override the doget method. No one is forced to do it. The problem is the doget method in the httpservlet class will always set the response code to 405 by calling the method response.sendError(405) even if you call super.doget in your doget method you will get the same message. so you should not call super.doget in your doget method






[BPSouther: added line breaks to quote]
[ October 03, 2006: Message edited by: Ben Souther ]

Yu cannot.

what you can dois use logical names for your jsp inside the report folder. Yu can do this using "jspfile" child tag in the servlet tag. Use the mactching url-pattern to restrict the access

First thing is you cannot post.
The easier way is to set a hidden variable before forwarding.

In the forwarded page's doget method check for that variable value. If it is set then call the dpPost method.

May be a silly answer but definetly not a stupid one


SCJP 91
SCWCD perparing
ISDX perparing

Cookies are stored as strings in the client machine
You can use getMasAge method is Cookie class to set the time for cookies to be persistance on the client machine. If you set it for -1 cookies will disappear immidetaly when the browser shuts down. Domain is something which is declared by the rfc. each cookie will come under some domain. Its a kind of logical grouping. I dont think any developer should worry much abt this.

SCJP 91
SCWCD perparing
ISDX perparing

use the method System.currentTimeMillis() to get the current time.

you can use a while loop to keep an eye on the time elapsed. And use a flag

say

boolean flag = flase;
while(System.currentTimeMillis()!=23612376){

//perform something
// if successful
flag = true

}

if(!flag)
throw ServletException

Hop this solves your problem

SCJP 91
SCWCD preparing
ISDX perparing