I'm using the Netbeans IDE but im trying to compile and run my
project via the unix shell:
I have a package: project/src/packageName/.java files
And my jars: project/lib/.jar files
The classes under src/packagename/.. more or less depend on each other and they're also using said libraries.
I added the libraries via Netbeans (though
NetBeans couldnt recognize the classes from the libraries I used in
my project, so I needed to extract the .jar files first and direct
NetBeans to the extracted jar folders containing the .class files
from the library).
When I run the class containing the main() method in NetBeans it works just fine.
But I'm trying to accomplish this with the unix shell using javac.
My question: How do I compile my project including the jars/foreign library.
I already tried the following:
javac -classpath ".:jar1.jar:jar2.jar:" /path/to/project/src/packageName *.java
It still said that symbol cannot be found (refering to classes from library)
Sorry if this question was answered somewhere else already, but after a few hours of research I couldn't get it working.
I guess I'm doing something horribly wrong?
Do read Java documentation for javac, here is JDK14 javac.
There are plenty of other options you can try especially if you want to define different file encodings or JRE source/targets.
You can simplify command if using relative path from current directory, just cd to your project directory first. Here is a simple call:
javac -d build/my.classes -sourcepath src -cp lib/abc.jar:lib/xyz.jar src/packageName/*.java
You may need to mkdir build or some other directory to store temporary files. After this you could try running your app with direct command for java on the files.
I have Ubuntu Linux system with Sun JDE 9.0.1 and I need to convert some of Fx's CSS files to binary form from console.
But when I execute the command:
javapackager -createbss -outdir . -srcdir .
I got an error:
Error: jfxrt.jar needs to be on classpath for -createbss and for
-createJar without -nocss2bin
My JDK is properly installed. I have all necessary modules (including FX).
Any ideas how I can avoid a stupid bug and I make the packager to do it's job?
If I run javapackager from "/usr/lib/jvm/java-9-oracle/jmods" directory it completes without error. So right now I am using an ugly fix, search the modules directory, make it current, run packager from there. But that's damn ugly.
javapackager doesn't accept any other parameters but outdir, srcdir and srcfiles so I can't force loading or looking path for the jfx module. But may there is some trick with environment variables or something that can make the fix less ugly?
P.S. Running from jmod directory or removing "-srcdir" from the parameters eliminates the error, but the packager doesn't generate any output files (even if I specify input files with "-srcfiles"). Seems as javapackager is completely broken in createbss mode. Does anyone use it with Java 9?
I've checked the sources - javapackager from JDK 9.0.1 is totally broken! Use executable file from Java 8. I filled out a bug report to Oracle and all of a sudden they were very surprised (nobody noticed that one of the basic function ot a core tool is broken yet?!).
TEMPORARY SOLUTION: Use the javapackaged tool from JDK 1.8. All you need is the executable itself and you can put at any place. I put it right into my project tree (under "tools" directory) and call from a building script. WARNING! Use this replaced executable for "createbss" ONLY! Use the regular one for all other things!
My program runs exactly as it should when I run it out of eclipse, but when I try to build it into a runnable jar I get problems.
When I set Library Handling to Extract required libraries into generated JAR, or Copy required libraries into a sub-folder next to the generated JAR, the program runs but doesn't do anything that involves the external libraries. When I set it to Package required libraries into generated JAR, absolutely nothing happens when I try to run the JAR.
At this point I have no idea what to do after spending the past hour looking online for solutions, library handling seems to work fine for everyone else?
I'm using eclipse 4.4.1 if it makes a difference
First check to make sure you have the libraries. To do so open up the jar file with win rar or something similar. If the libraries are missing you can just copy and paste them into the jar file.
If they are there then you can create a batch file (If using windows) to run your jar file with the java command. Doing this will give you a console in command prompt to view output and stack-traces. This can help you find where the problem is.
Command for .bat file:
java -jar jarfile.jar
If you don't want to create a batch file and run it from command prompt, remember to make the cmd path the same as the jar file location.
I can't open or run my .jar file.
I just installed java, but I tried to open the .jar with other programs first, so the double-click defaults to something else and I can't change it back.
java -jar myfile.jar`
Above command returns:
'java' is not recognized as an internal or external command, operable program or batch file.
Is there a way I can still open/run this?
e: OS is Windows 8.
Also, I downloaded the .jar file; didn't create it myself (if that's relevant)
Not sure if it contains an executable (but I think it does).
you can use the command prompt:
javaw.exe -jar yourfile.jar
Hope it works for you.
There are two different types of Java to download: The JDK, which is used to write Java programs, and the RE (runtime environment), which is used to actually run Java programs. Are you sure that you installed the RE instead of the SDK?
Use cmd prompt and type
java -jar exapmple.jar
To run your jar file.
for more information refer to this link it describes how to properly open the jar file.
https://superuser.com/questions/745112/how-do-i-run-a-jar-file-without-installing-java
You may have several JDKs installed in your PC. Some older JDK installers also copy some java files such as java.exe, javaw.exe into C:\Windows\System32 folder.
I had a similar issue, and searched the internet for a solution and none of the suggestions didn’t open by double clicking the .jar file.
In my case the reason is I have multiple JDK & JRE versions installed on my computer. Since I am a software developer working with several different versions for different clients I need to use multiple JDKs in my PC (Windows 10 Pro). So I do not want to change the system variables (i.e. JAVA_HOME, JRE_HOME or PATH), instead I use command prompt to run java in user process whenever I wanted to use a different version.
When installing JDK it registers the .jar file association with latest version we installed in the PC. If you right click on the .jar icon and select properties, it will show that file opens with “Java(TM) Platform SE Binary”. If we look at the registry key: HKEY_CLASSES_ROOT\jarfile\shell\open\command, it will point to latest JDK version.
It is not a good idea (sometimes annoying) to change the registry key every time I want to run an app build from a different version.
So in my situation it is impossible to just double click the .jar file to execute it. But instead I found a work around solution myself.
Scenario:
Multiple JDKs (1.7, 1.8, 9.0, 10.0, 11.0, and 12.0)are installed in the PC, so the latest installed was 12.0.
Problem
Want to double click an executable .jar developed using JDK 1.8 and didn’t work
This is my work around solution:
Create a shortcut for the .jar file that you want to open.
Right click the shortcut icon and select properties -> Shortcut tab
Change the text in the target (for example "D:\Dev\JavaApp1.8.jar")
To
"C:\Program Files\Java\jdk1.8.0\bin\javaw.exe" -jar
"D:\Dev\JavaApp1.8.jar"
Then click ok Double click the shortcut.
It should now open the app.
I was having this same issue for both Windows 8 and Windows Server 2012 configurations.
I had installed the latest version of JDK Java 7 and had set my **JAVA_HOME**system env variable to the jre folder: *C:\Program Files (x86)\Java\jre7*
I also added the bin folder to my **Path** system env variable: *%JAVA_HOME%\bin*
But I was still having problems with double clicking the executable jar files. I found another system env variable OPENDS_JAVA_ARGS that can be used to set the optional properties for javaw.exe. So I added this variable and set it to: -jar
Now I am able to run the executable jar files when double clicking them.
In cmd you can use the following:
c:\your directory\your folder\build>java -jar yourFile.jar
However, you need to create you .jar file on your project if you use Netbeans. How just go to Run ->Clean and Build Project(your project name)
Also make sure you project properties Build->Packing has a yourFile.jar
and check Build JAR after Compiling
check Copy Depentent Libraries
Warning: Make sure your Environmental variables for Java are properly set.
Old way to compile and run a Java File from the command prompt (cmd)
Compiling: c:\>javac Myclass.java
Running: c:\>java com.myPackage.Myclass
I hope this info help.
Go to your java directory,
Copy this path
C:\Program Files\Java\jdk1.8.0_40\bin
Right click on my computer , click properties, then go to "Advanced system settings"
click , Environment variables.
go to "System variables" table, find an entry named "path".
Double click it and go to the end, put a semicolon and paste your path, apply and ok.
It should run now.
first of all, we have to make sure that you have downloaded and installed the JDK.
In order to download it click on the following link
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
(Do not forget to check "Accept License Agreement", before you choose the version you want to download)
For Windows OS 32-Bit (x86) choose "jdk-8u77-windows-i586.exe"
For Windows OS 64-Bit (x64) choose "jdk-8u77-windows-x64.exe"
Install the file that is going to be downloaded. During the installation, pay attention, because you have to keep the installation path.
When you have done so, the last thing to do, is to define two "Environment Variables".
The first "Environmental Variable" name should be:
JAVA_HOME
and its value should be the installation path
(for example: C:\Program Files\Java\jdk1.8.0_77)
The second "Environmental Variable" name should be:
JRE_HOME and its value should be the installation path
(for example C:\Program Files\Java\jre8)
As soon as you have defined the Environment Variables, you can go to command prompt (cdm) and run from every path your preferred "java.exe" commands. Your command line can now recognize your "java.exe" commands.
:)
P.S.: In order to define "Environment Variable", make a right click on "This PC" and select "properties" from the menu. Then the "System" window will appear and you have to click on "Advanced system settings". As a consequence "System properties" window shows. Select the "Advanced" tab and click on "Environment Variables" button. You can now define the aforementioned variables and you're done
You must create a manifest file and specify your class that has the main method. you can build your jar file with manifest file as a parameter.
jar cfm MyJar.jar Manifest.txt MyPackage/*.class
Manifest-Version: 1.0
Archiver-Version: Plexus Archiver
Created-By: Apache Maven
Built-By: Cakes
Build-Jdk: 1.6.0_04
Main-Class: com.foo.App
An easy way to execute .jar files is to create a batch file.
Let's say you placed your jar file on your Desktop;
#echo OFF
java -jar C:\Users\YourName\Desktop\myjar.jar
Copy this code to a .txt file, modify "YourName" and save as "myjar.bat". Then whenever you double click, the jar file will be executed.
Hope this helps.
Short trick: after I only REMOVED SPACES from names of the folders, where the .jar file was, double-clicked worked and the file executed.
In Netbeans please delete current you create the jar file and on the project explore of Netbeans please clean and build 2 or 3 times and right the project folder in project explore and build the jar file.
I had this problem a while back and the solution was really easy.
Just uninstall the current version of Java, download an older one, then uninstall the older and install the latest again.
For example: Java 8 Update 73 current install Java 7 Update 95.
How it works: Java's registry keys were messed up, and when you install the older version they get fixed.
If the intention of the question is to view the contents of the JAR file, then the following java command would help.. (provided, JDK location is added to the environment variables.)
Windows Command prompt> jar tvf yourJarFile.jar
Example:
jar tvf log4j-extras-1.2.17.jar
Reference: http://docs.oracle.com/javase/tutorial/deployment/jar/view.html
I downloaded the latest JDK 7u10. Once you do that, try running your jar, It should execute.
I have an ant script which compiles java code and executes it but when I run it on a machine where ant is not installed it does not execute nor compile. Is there any way to do this?
Thanks
No, there is no way to do this.
Basically, running a program require having this program installed. No mater what program it is.
Copy bin and lib directories from a Ant -package to your project path and run "bin\ant".
Or for example you project path could contain:
build.xml
src
software\ant\bin
software\ant\lib
You can run "software\ant\bin\ant" in you project path.
You can try to create something similar to the gradle wrapper for ant.
Basically, it's a batch/shell script and a simple jar that only need a valid JAVA_HOME to run. When you launch this script it download gradle if required (i.e. not already available at a well known location), then it execute your gradle build.
Imagine someone saying, "I have a C/Python/Perl/C++/Whatever program I want to compile. Is there anyway to compile that C/Python/Perl/C++/Whatever program without having to install C/Python/Perl/C++/Whatever?"
The answer would pretty much be no. You need Ant to interpret the Ant build files.
Fortunately, installing Ant is pretty straight forward. You download the ZIP file from Ant's Distribution Page, then unzip it into some directory (preferably one without spaces in the name. C:\Program Files\Apache Ant isn't a good choice, but C:\apache-ant would be fine.
Now, you set two environment variables, ANT_HOME pointing to where you installed Ant, and JAVA_HOME pointing where you installed the Java JDK. (Windows comes with the Javaruntime, but you need to have the Java JDK which you can get from Oracle.) This can be done by going into the System Control Panel->Advanced
WARNING: When installing Java Developer Kit (JDK), be very, very careful not to accidentally install the Ask Toolbar. Java does this by default.
Once that is done, set your PATH (again via the PATH Environment variable to include %ANT_HOME/bin and %JAVA_HOME%/bin at the beginning of your path.
Then, running ant on the command line in a Console window will run Ant. The whole procedure takes about 10 minutes to do.