The question but in C#. So does Java have C#'s command? I need it for Matches-SearchTerm-Files-relationship.
foreach(var i in BunchOfItems.SelectMany(k => k.Items)) {}
Hey,
I have a Java desktop application I wrote, and I would like a recommendation about a monitoring application that can spot bottlenecks in the code and real time memory consumptions.
As I was developing for J2Me, the WTK then, had a memory monitor, and I found it really useful, I would like to know which monitoring program you think is best to use.
Thanks,
Adam.
I need to get the minimum and maximum values in a collection of floating point values, after applying an absolute value conversion. In python I would do this
min(map(abs, [-5, -7, 10, 2]))
how can I perform the same operation in java in the most elegant way?
I have a big program on java, that uses multithreading. In some case, the program starts loading 100% of three cores of my eigth cores system. In normal use, the program use all cores of 1-2 percent loading. How can i find a class, that overloading cores?
Why do we use reverse domain name like com.something. or org.something. structure for java packages?
I understand this brings in some sort of uniqueness, but why do we need this uniqueness?
What would be the best way to wait for a return key press from the user using the Java Scanner Class?
In a command line tool I would like the user to confirm before carrying out an action.
Please correct me if there a more standard way of doing this in a command line tool.
I need a nautilus-style file picker in java, where the files are shown "gallery-style" with a customisable thumbnail for each file. Is it possible to make the standard open file dialog do this? If not, does anyone know of an open-sourced widget that I can use?
I am looking for a easy to use library in java that can convert a video into arrays(corresponding to frames). Arrays will be used for frame processing with standard algos like GMM
I'm trying to install the Java Enterprise Edition 6 on my workstation. I downloaded the installer from the Sun website. Whenever I get to the option in the installer "JDK Selection" I'm told to manually select a JDK. I gave it my path (C:\IBM\rad7\jdk\), and was told it is invalid. What do I need to do to successfully install JEE6?
I have written a java application which is a RMI server. I need to start rmiregistry to run this application and i also want my apllication to start automatically when the system starts.
I have converted my application into a windows servise. When i try to start my service it shows this error
Error 1067: The process terminated unexpectedly
Is it because my program throws an exception when my application is started before the rmiregistry is started.
Should a future release of Java deprecate the use of raw types to force the migration to generics? I could also see having raw types not allowed by default but allowing them via a compile flag for legacy code.
i am trying to make java application that can get the information from other active window program ...such as information bar or even screenshot of other active window
is JNI the only option in this case?
thanks
Im using Java to create a maze of specified "rows" and "columns" over each other to look like a grid.
I plan to use a depth-first recursive method to "open the doors" between the rooms
(the box created by the rows and columns).
I need help writing a openDoor method that will break the link between rooms.
In Java I'm trying to test for a null value, from a ResultSet, where the column is being cast to a primitive int type.
int iVal;
ResultSet rs = magicallyAppearingStmt.executeQuery(query);
if (rs.next()) {
if (rs.getObject("ID_PARENT") != null && !rs.wasNull()) {
iVal = rs.getInt("ID_PARENT");
}
}
From the code fragment above, is there a better way to do this, and I assume that the second wasNull() test is redundant?
Educate us, and Thanks
I have started making some small Java games that run in a browser and have found a couple of game portals where I can host then (GameJolt.com, JavaGameTomb.com and Games4j.com). Most of the other portals I find either only allow Flash or offer the games for download.
Apart from those above, what other portals exist that allow hosting applets?
In python I can construct a HTML string without worrying about escaping special characters like < or " by simply enclosing the string in triple quotes like:
html_string = """
<html>
<body>
<p>My text with "quotes" and whatnot!<p>
</body>
</html>
"""
Is there a similar way to do this in Java?
I am building a web application, in Java, where i want the whole screenshot of the webpage, if i give the URL of the webpage as input.
The basic idea i have is to capture the display buffer of the rendering component..I have no idea of how to do it..
plz help..
Is it possible to define array in this way in JAVA, otherwise are there an alternative close this definition?
private final int CONST_0= 0;
private final int CONST_1= 1;
private final int CONST_2= 2;
private final int CONST_3= 3;
private final String[] CONST_TXTRECORDS = new String[]
{[CONST_0] = "test0",
{[CONST_1] = "test1",
{[CONST_2] = "test2",
{[CONST_3] = "test3"};
Is there anyway to make web service calls from a Java client app. (Apache Axis based) in parallel? Does async style Web Service client (Apache Axis based) help?
Today I was browsing through some question on this site and I found mention of enum being used in singleton pattern and that there are some thread safety benefits to such solution.
I never used enums and I have been programing in java for more than couple a years now. And apparently they changed a lot and now they even do full blown support of OOP within them selfs.
Now why and what for should I used enum in day to day programing?
ipString is a String representation of an IP address with spaces instead of dots.
String[] ipArray = ipString.split(" ");
String ip = "";
for (String part : ipArray){
if (part != null){
ip += part
}
}
ip = ip.trim();
int ipInt = Integer.parseInt(ip); // Exception is thrown here.
Exception in thread "main" java.lang.NumberFormatException: For input string: "6622015176".
Could someone explain why this exception is being thrown?
Hi everyone,
I have a double number like 223.45654543434 and I need to show it like 0.223x10E-3
for example,
how can I do it in java????????
URGENT!!!!!!!!!!!
thanks!
In Java if an input argument to a method is invalid, we can throw an IllegalArgumentException (which is of type RuntimeException). In C++, there is no notion of checked and unchecked exceptions. Is there a similar exception in standard C++ which can be used to indicate a runtime exception? Or is there a common style not in the standard but everyone follows in practice for a situation like this?
Or, should I just create my own custom exception and throw it?
Is there a third party library to detect the use of a Java 1.5 library when compiling with a 1.5 compiler with -source 1.4 and -target 1.4? I could use a 1.4 rt.jar in the bootclasspath however I hope there is a better way. To be used, for example, to fail the compile/build if a newer library is used.
Per the title, do you find the default Java logging framework sufficient for your needs?
Do you use alternative logging services such as log4j or others? If so, why?
I'd like to hear any advice you have regarding logging requirements in different types of projects, and when integrating frameworks is actually necessary and/or useful.