Is it slower to iterate through a list in Java like this:
for (int i=0;i<list.size();i++) {
.. list.get(i)
}
as opposed to:
for (Object o: list) {
... o
}
I am writing an application program in java. If i need to exit from the application can i use system.exit or should i use some other method, which is good practice. If calling system.exit is not good practice then tell the reason and tell the alternative way to exit from the application.
Hey guys - I am trying to set my user agent string in the HttpClient apache object in Java but I cannot find out how to do it.
Please help!
Also I am trying to enable redirects to true but also cannot find this option within the HttpClient object.
Thanks
Andy
I have created a program using the built in java.util.hashtable but now I need to resolve collisions using separate chaining. Is it possible with this implementation of a hashtable? Is there one out there already implemented that uses separate chaining?
hi,
I would like to know if it is possible to maintain an authentication (like a session with login and password in php) on a website from a java program, and if anyone had any lead on the subject or some reading for me, that would be great.
thanks
I make an Application in java and draw rectangle. When I search from combobox the rectangle is under the combobox and when I close combobox some parts of the rectangle which was under the combobox is deleted. How can I make rectangle to be visible after the combobox was closed.
Hi,
I want to create a Word or RTF file with a table of contents (with links to each section) from Java. From my understanding, iText & Apache POI do not support generating a table of contents. Some clients of the app still use older versions of Word, so I need a library that supports the older Word doc format. Does anyone know how I can do this?
Thanks,
Glen
Is there a way to get Class object from the type variable in Java generic class? Something like that:
public class Bar extends Foo<T> {
public Class getParameterClass() {
return T.class; // doesn't compile
}
}
This type information is available at compile time and therefore should not be affected by type erasure, so, theoretically, there should be a way to accomplish this. Does it exist?
How do java people handle clean up of their apps when the program receives a kill signal?
For instance, there is an application i connect to which wants any third party app ( my app) to send a "finish" command. What is the best say to send that "finish" command if one does a kill -9 on me.
How can I print the type of a generic java type?
Reflection? Any tricks?
public class Foo<K> {
private K element;
@Override
public String toString() {
return "Type: " + K;
}
}
hello!
I need to extract the zipcode from file's line.
each line contains an adress and is formatted in a different way.
eg.
"Großen Haag 5c, DE-47559 Kranenburg"
or
"Lange Ruthe 7b, 55294 Bodenheim"
the zipcode is always a five digit number and sometimes follows "DE-".
I use Java.
Thanks a lot!
hey folks,
Can someone help me with this Java problem?
I want to write a method that takes two strings as arguments and returns true if each character (including space and punctuation) that appears in one string also appears in the other.
Thanks
Say your application is unresponsive and you cannot attach a debugger to it, as it rejects everything. All you have is a Linux Bash and process id. How would you investigate the issue? What tools would you use? My goal is to better my troubleshooting skills using Java.
This particular issue we had in production, on customer site.
Hi, everybody. I invoked shell command by Process class of java and it gave "stty: standard input: Invalid argument" no matter the command is right or wrong (normal output of shell command is shown too). If I run the shell command in shell, no such error message shows. I can't figure out why.
Thanks
Is there any technique available in Java for intercepting messages (method calls) like the method_missing technique in Ruby? This would allow coding decorators and proxies very
easily, like in Ruby:
:Client p:Proxy im:Implementation
------- ---------- -----------------
p.foo() -------> method_missing()
do_something
im.foo() ------------------> do_foo
p.bar() --------> method_missing()
do_something_more
im.bar() -------------------> do_bar
(Note: Proxy only has one method: method_missing())
This post is similar to this post, but not exactly, so I'm asking this question.
How does one go about, From a Java WebStart app:
launch a new browser window with a target URL?
bring an existing browser window into
focus with a target URL?
Is the solution OS/platform independent? Does it matter which browser you're talking to?
hi,
I need the java code snippet for the below logic:
Following is a string and I need to validate the string based on the below condition :
"100 or 200 and 345 not 550 " - Valid string
"abc or 200 and 345 SAME ** 550 " - Not a Valid String
1 . the operands(eg 100,200 ..) should be positive numbers
2 . the operator should be and/or/not
Thx
I want from my java code to open word document. But not just to open the document but also to open on exact page or paragraph.
Any ideas or guidelines?
Thanks in advance!
Hi,
I am getting the following error when deploying an application on JBoss 4.2.1
7:05:59,673 ERROR [Application Name]StandardWrapper.Throwable
java.lang.IllegalStateException: Application was not properly initialized at
startup, could not find Factory: javax.faces.context.FacesContextFactory
I browsed the net and I found many posts which suggested to add an entry in web.xml but that entry was already there. And all the required libraries are there in web-inf.
So any solutions anybody ?
This question got me re-thinking about something that always bothered me:
Does Java need tuples?
Do you feel the lack of them in your day-to-day work? Do you think tuples would simplify otherwise complex data structures you find yourself implementing?
I know this is not possible but can anyone provide a theory as to why Java chose not to support this? I am asking because I just ran into a situation where I think it would be nice to have.
I have a simple xml file and I want to remove everything before the first tag.
.....
item1
....
The following java code is not working:
String cleanxml = rawxml.replace("^[\\s\\S]+<item>", "");
What is the correct way to do this? And how do I address the non-greedy issue? Sorry I'm a C# programmer.
Is there a way/tool to auto convert Java source code from using raw types to using generic types?
I have some legacy code with 677 references to raw types:
ArrayList 47
Vector 420
Hashtable 61
Enumeration 64
Class 7
Iterator 78
TOTAL 677
Now I could manually look through the code to infer the generic types and replace, but that is going to take a long time.
What is the best way to capture a kill signal in java without using JNI. I did discover the sun.misc.Signal and the sun.misc.SignalHandler and the warning of the possibility of being removed in the future releases.
Would using JNI to call a c lib be the only option i have?