Programming :: Importing A Package Recursively (with Subpackages) In Java?
Feb 26, 2010
I'm a 1st-year CS major and am new to Java. I had a question about importing packages. As I understand it, when you use a wildcard when importing, it will import the classes within the package specified before the asterisk, but none of the subpackages in the specified package.is there a way to include all classes and subpackages recursively with a single line, instead of doing:
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
As I understand it, it doesn't actually cause any bloat in your bytecode, so if it can be done, would there be any disadvantage?
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Jan 30, 2009
I am running into a small bit of difficulty with images I want to use in a Java program, keeping them bundled with the program in a JAR file and accessing them within the package.For those who are thinking it, this is definitely not homework.In my program, I have several images I would like to use on buttons on a toolbar.I have Googled, and I found something that comes close, but it deals with fetching images from a URL - nothing that deals with local files, more specifically, local images kept inside of a JARchive.
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Feb 16, 2011
i am a complete newbie in java. while dealing with packages i faced the following problem. I created a file named "CreatePackage"
Code:
package lobkush;
public class CreatePackage {
public CreatePackage() {
System.out.println("you are presently under package named "lobkush" ");
}
}
after this i created a folder named "lobkush".I also compiled the source file and placed the .class file in the corresponding directory.
Now to test it i created another java file. This is where the problem arises.while importing the class file if I write:
Code:
import lobkush.*;
the compiler shows an error
but if I write
Code:
import lobkush.CreatePackage;
no error is shown and the .class file generated.
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Jul 23, 2009
Does anybody know any Java package that can be used for playing music with different kind of instruments. Is any package which implements the java.sound api http://java.sun.com/products/java-me.../doc-midi.html
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Feb 27, 2010
Well my problem is that i want to configure Net filter (FORWARD) not manually but by importing a text file which may contain a binary array with c++ language like :
0 0 1
1 1 0
0 0 1
with 0 is "IPTABLES -A FORWARD -p udp -j ACCEPT"
and 1 is "IPTABLES -A FORWARD -p udp -j DROP"
so after importing i want to find in my firewall 9 rules equal to the numbers of the binary array.
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Jul 29, 2010
Say, I have a header file containing all required includes:
Code: /* global.h */
#include <stdio.h>
#include <unistd.h>
...
#include <dirent.h>
#include <signal.h>
... /* and so on */
I have several modules in a program (*.h *.c files) and in each *.h I include global.h, then they are included in corresponding *.c files. And I receive strange messages from compiler, like a "warning: implicit declaration of function fdopendir", "error: expected declaration specifiers or '...' before 'siginfo_t' ", "error: 'DT_DIR' undeclared..." though these types, functions and constants are all declared in system headers. What does it mean?... Compiler is GCC 4.4.4-2, system is Fedora 13 x86_64
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Apr 1, 2010
I work on two hosts, [1] with online ftp access, and [2] without ncftp installed, but with ssh access.
Now I need to recursively upload a folder from [2] to [1]. So I can't use hardfeed - which is for downloading
I think I can use a
find ./orig -exec curl ftp://pinshosting.net
But I'm not so so known with the params of find and curl to get it working recursively.
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Jun 13, 2011
I am trying to import a data file from old DOS application into MYSQL table The file is clear text file with fixed-width columns, without column delimiters
Example file :
Code:
4444333666666
2222666555555
iiiiwwwcccccc
[Code]...
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Feb 20, 2010
I have searched diligently but can't seem to find a way to search by exif date. Most of my searches turned up commands to manipulate EXIF data not just search by it. I have found some likely tools but suspect that I don't know enough bash to recursively find a .jpg file by it's exif date. For example, exiprobe and exifgrep look promising (see examples below).
I have made some progress. At first, I couldn't associate the file name with the date given but learned that the "n" option forces each output line to start with the file name. Now, I need to make the command recurse but can't seem to manage it.
halloween_IMG_0965.JPG: JPEG.APP1.Ifd0.Exif.DateTimeOriginal = '2009:10:31 20:58:52
If it helps, I have linked to the man pages [URL]
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Nov 29, 2009
My problem is this:I have a number of directories, all containing files of different name lenghts, including letters, numbers and possibly spaces. I want to recursively rename all of these files, so that only the _last_ 5 digits (not counting the extension) remain. In other words: I want to cut off all but the last 5 digits and not touch the extension.
I've tried to read up on tr, rename (perl version), sed, cut etc. and browsed through some threads here, but so far couldn't quite figure out how to do it.
If someone could point me to the right (standard) CLI tools and syntax.
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Nov 4, 2010
I've found myself in the situation where I need to create a menu in gnome/kde for a directory structure full of documents.The directory structure looks like this:
Code:
DOCS/
.. REFERENCES/
[code]...
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Nov 8, 2010
I want to find maximum length file in a given directory. It should search recursivley. I want this to be done using ls and simple looping constructs.
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Jun 3, 2010
I have a directory listing with many subdirectories having many files. I want to recursively search for the oldest 5 files starting from the base directory and not 5 from each subdirectory. I am writing a shell script which sorts them using ls -lRtur|egrep "txt|jpg" > /tmp/file1 Now from this /tmp/file1 file I want to sort the files same as what the ls -ltr command does that is oldest file time to newest file time first. How do I sort based on Linux time stamp? The files itself also have Linux timestamps embedded in them So I can sort based after extracting them as well if it is easier.
My /tmp/file1 has entries like below.
-rw-rw-r--. 1 usr1 usr1 705 2010-01-22 17:25 sample20100603173659.jpg
I want to get the 5 oldest files and then delete them.
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Dec 17, 2010
I thought I knew what I was doing, just a minimal install of slackware 13.1 for a game server (minecraft), but it seems I missed java or something - I get the "command not found" error. gcc-java is installed. What package did I miss/what series is it in? Does it have any dependencies?
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May 6, 2009
What is 'java-1.4.2-gcj-compact package' Is this a JDK or just JRE?
I want to remove 'java-1.4.2-gcj-compact' package and install sun's JDK1.6. But lots of other packages depends on 'java-1.4.2-gcj-compact'. How should I go ahead.
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May 15, 2010
i wanted to know whether the gcc,g++ libraries are pre-installed i slackware 12.1 or not. if not then from where can i download them .how do i install them? how do i install the java jdk package also?
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Mar 7, 2010
Groovy is an object-oriented programming language for the Java platform. I do not have experience in Java, only perl and shell scripts. Recently I have been asked to maintain a software written in groovy (also to make enhancements). So can I learn groovy without knowing java language. or isit I have to learn java before venturing into groovy.
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Mar 19, 2011
I'm am very new at debian. I have tried to use the apt install to install java-package an fake root after it says cannot find java-package also fake root doesn't work?
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Aug 26, 2010
I'm trying to install Open Rocket : [URL]. I don't think I have java installed. I went to software center and tried to install "OpenJDK Java 6 runtime" and it says package dependencies cannot be resolved. I tried doing sudo apt-get install through terminal and it was dependent on a long list of things:
openjdk-6-jre
openjdk-6-jre-headless
tzdata-java
tzdata
I tried to sudo apt-get each one and it led me down the list like that to a dead end.
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Apr 4, 2010
i downloaded packages of java and amsn but i cant see them in the synaptic package manager.when i search them i cant find and when i click file--> add downloaded packages ,it doesnt take this packages.
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Jan 9, 2011
I'm trying to play around with java 3d, but having troubles to get some example to run.
NetBeans don't likes the line "import javax.vecmath.*;", it tells me that "package javax.vecmath does not exist",...
Code:
etc/environment holds following:
Code:
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Nov 22, 2010
I'm building a certain RPM package that must require an old version of that same package in order to be installed/upgraded. Is this possible?
For example:
For a package foo v5, somewhere in the spec file:
"Requires: foo >= 4"
I'm declaring this on the Requires tag of the spec file, but when I try to install or upgrade the package (without having the previous required version installed) I get no dependency error! As for other dependencies it all works fine. If, instead, I create a package named "bar" that "Requires: foo >= 4", when installing I do get the expected dependency error. I'm thinking it's not possible to require an old version of the same package.
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Jan 6, 2011
how to implement this.
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Mar 12, 2010
I would like to run java program on fedora10 but I am facing some problems. When I use which java command it show usr/bin/java directory. I was trying to set the java_home path in bash_profile,but there is no affect.
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May 12, 2011
Situation: this semester I took an class called Introduction to Software Design with Java.It was my first intro to programming. The class had a very odd structure:1. The text was extremely high level. The first few chapters were all about object oriented programming, how objects interact, all about specification, etc (without ever talking about implementation).2. The lecture simply followed (directly) the text. And as a result was rather uninteresting.3. While highly theoretical (in that it was very high level approach), we never talked about how the computer was dealing with the information, etc.as all very "hand waving/magic" approach.
Okay so enough of the complaints:Question: This summer I'd like to dive a bit more into a language mainly out of frustration and lack of a good book. I'm thinking perhaps a lower level language.1. Would C++ be a good second language? Or should I give Java more time?2. If I am going to go with something else, is C++ sufficiently different, or should I go with C
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Apr 8, 2010
i want to compile function c in java and compile library is success.. when i call the library in java and error is :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no libfunc.so in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1689)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1028)
[Code]....
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Jul 26, 2010
I've just installed java (jre-6u21-linux-i586.bin) on Red Hat 4.4 AS and issued this command to check the java version: java -versionand got :bash :java: command not found
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Aug 13, 2010
I want to call c exe from java source code and i want to interact with the c program during it's execution, i am able to send the parameters to c program but i am not able to interact with it.
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Jun 16, 2011
how can i port (easy) C++/STL to java ???
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Apr 6, 2010
i want compile function c to java under linux. the bashfile comp :
$ cc -fpic -c $(SRCS)
$ ld -shared $(OBJS) -o module.so
i see in www.swig.org
$ comp -java example.i # line 1
$ gcc -c example.c example_wrap.c -I/usr/java/jdk1.6.0_17/include -I/usr/java/jdk1.6.0_17/include/linux # line 2
$ gcc -shared example.o example_wrap.o -mno-cygwin -Wl,--add-stdcall-alias -o example.so #line 3
error line 3 :
/usr/bin/ld: unrecognized option '--add-stdcall-alias'
/usr/bin/ld: use the --help option for usage information collect2: ld returned 1 exit status
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