I have a JAR file named helloworld.jar. In order to run it, I'm executing the following command in a command-line window:
java -jar helloworld.jar
This works fine, but how do I execute it with double-click instead? Do I need to install any software?
Easiest route is probably upgrading or re-installing the Java Runtime Environment (JRE).
Or this:
C:\Program Files\Java\j2re1.4.2_04\bin\javaw.exe" -jar "%1" % (Note: the part starting with 'javaw' must be exactly like that; the other part of the path name can vary depending on which version of Java you're using) then press the OK buttons until all the dialogs are closed.Which was stolen from here: http://windowstipoftheday.blogspot.com/2005/10/setting-jar-file-association.html
In Windows Vista or Windows 7, the manual file association editor has been removed.
The easiest way is to run Jarfix, a tiny but powerful freeware tool. Just run it and your Java apps is back... double-clickable again.
In Windows XP * you need just 2 shell commands:
C:\>ftype myjarfile="C:\JRE1.6\bin\javaw.exe" -jar "%1" %*
C:\>assoc .jar=myjarfile
obviously using the correct path for the JRE and any name you want instead of myjarfile.
To just check the current settings:
C:\>assoc .jar
C:\>ftype jarfile
this time using the value returned by the first command, if any, instead of jarfile.
* not tested with Windows 7
Besides all of the other suggestions, there is one other thing you need to consider. Is your helloworld.jar a console program? If it is, then I don't believe you'll be able to make it into a double-clickable jar file. Console programs use the regular cmd.exe shell window for their input and output. Usually the jar "launcher" is bound to javaw.exe which doesn't create a command-shell window.
You want to check a couple of things; if this is your own jar file, make sure you have defined a Main-class in the manifest. Since we know you can run it from the command line, the other thing to do is create a windows shortcut, and modify the properties (you'll have to look around, I don't have a Windows machine to look at) so that the command it executes on open is the java -jar command you mentioned.
The other thing: if something isn't confused, it should work anyway; check and make sure you have java associated with the .jar extension.
Create .bat file:
start javaw -jar %*
And choose app default to open .jar with this .bat file.
It will close cmd when start your .jar file.
PreScript: If your prompt appears and disappears immediately, the reason it does so is that your program gets executed and auto shut. Try putting a scanner in the end to terminate and it'll keep your prompt waiting for input before terminating. (Or use delay maybe)
Was in the very same situation, where running .jar from cmd was working fine, but double clicking did nothing.
Solution: Open any text editor and write the command line: java -jar Example.jar Save the file as a .bat file. Run this bat file to get the needed output.
Taking it one step forward, you can convert this bat file to exe file using a simple GUI tool like Bat To Exe Converter.
Now you can share your .jar as a distribution in .exe file which anyone can use just make sure you keep all the files together. (Especially the .jar and .bat file cause .bat is only a cmd prompt)(How it feels logical)
I am fairly new to development and learning a lot. Please excuse for any mistakes if committed. Suggestions are welcome.
Got the same problem, on Windows 10
The solution:
.jar and javaw.exeSteps:
1.) search for Java SE Runtime Environment on Google: https://www.google.com/search?q=Java+SE+Runtime+Environment
2.) install the appropriate version onto your computer
For compiling:
javac -cp ".;./mysql-connector-java-5.0.8.jar;mybatis-3.0.1.jar;ibatis-2.3.0.677.jar" MainStart.java
For running:
java -cp ".;./mysql-connector-java-5.0.8.jar;mybatis-3.0.1.jar;ibatis-2.3.0.677.jar" MainStart
Actually, I faced this problem too,
I got around with it by making a .bat runner for my jar file
here is the code:
class FileHandler{
public static File create_CMD_Rnner(){
int exitCode = -1625348952;
try{
File runner = new File(Main.batName);
PrintWriter printer = new PrintWriter(runner);
printer.println("@echo off");
printer.println("title " + Main.applicationTitle);
printer.println("java -jar " + Main.jarName + " " + Main.startCode );
printer.println("PAUSE");
printer.flush();
printer.close();
return runner;
}catch(Exception e){
System.err.println("Coudln't create a runner bat \n exit code: " + exitCode);
System.exit(exitCode);
return null;
}
}
}
Then in Your Main application class do this:
public class Main{
static String jarName = "application.jar";
static String applicationTitle = "java Application";
static String startCode = "javaIsTheBest";
static String batName = "_.bat";
public static void main(String args[]) throws Exception{
if(args.length == 0 || !args[0].equals(startCode)) {
Desktop.getDesktop().open(FilesHandler.create_CMD_Rnner());
System.exit(0);
}else{
//just in case you wanted to hide the bat
deleteRunner();
// Congratulations now you are running in a cmd window ... do whatever you want
//......
System.out.println("i Am Running in CMD");
//......
Thread.sleep(84600);
}
}
public static void deleteRunner(){
File batRunner = new File(batName);
if(batRunner.exists()) batRunner.delete();
}
}
this code (my code) works only with a jar file, not a class file.
the jar file must have the same name as the String "jarName" is the Main class