Executable JAR File

[amitpathak]

HI

Suppose There is a HELLO WORLD Application in java

When I am running this in a command prompt it is printing the "Hello World"
in a console window

Next Time When i make the executable jar of the same application and tried to run the jar at Command prompt
Nothing happened I mean it is not printing "Hello World".

I hope you got my question if not please specify.

Thanks in advance

[r035198x]

HI

Suppose There is a HELLO WORLD Application in java

When I am running this in a command prompt it is printing the "Hello World"
in a console window

Next Time When i make the executable jar of the same application and tried to run the jar at Command prompt
Nothing happened I mean it is not printing "Hello World".

I hope you got my question if not please specify.

Thanks in advance

1.) How did you make the jar file?
2.) Is there anything being written to the console when you run it?

[amitpathak]

1.) How did you make the jar file?
2.) Is there anything being written to the console when you run it?

through ant script.But I am sure that there is no problem in JAR
because when I tried to create the file for eg(c:sample.txt ) through the same application it worked

only System.out.prin tln();
has no effect when I tried to run the jar
rest all is working

[r035198x]

through ant script.But I am sure that there is no problem in JAR
because when I tried to create the file for eg(c:sample.txt ) through the same application it worked

only System.out.prin tln();
has no effect when I tried to run the jar
rest all is working

Did you specify the Main-Class attribute in the manifest file?

[JosAH]

Did you specify the Main-Class attribute in the manifest file?

My guess is that the .jar file type is associated with the javaw.exe command;
that version of the virtual machine doesn't start a console window; the OP needs
to associate his .jar files with the java.exe command instead.

Assuming the OP is using a Microsoft Windows o.s.

kind regards,

Jos

[amitpathak]

My guess is that the .jar file type is associated with the javaw.exe command;
that version of the virtual machine doesn't start a console window; the OP needs
to associate his .jar files with the java.exe command instead.

Assuming the OP is using a Microsoft Windows o.s.

kind regards,

Jos

Yes I have specify the main class path in Manifest file
the thing you are trying to say i m not getting it
could you be more explainable.Ple ase

[r035198x]

Yes I have specify the main class path in Manifest file
the thing you are trying to say i m not getting it
could you be more explainable.Ple ase

If you're using windows then the program that you have associated with jars (default program for running jar files) is javaw.exe instead of java.exe. javaw.exe does not have the console so any output from your program that's supposed to go to the console is not displayed. Simply change the default program for opening jars to be java.exe

[JosAH]

Yes I have specify the main class path in Manifest file
the thing you are trying to say i m not getting it
could you be more explainable.Ple ase

MS Windows uses 'file type associations'; when you click on any file, the
associated program is searched and if found your file is used as an argument
for the associated program.

There are two variations for the virtual machine: java.exe and javaw.exe. The
first opens a console for your jar's standard input, output and error streams.
The second doesn't open a console. If the second program is associated with
the .jar file type you can't see a console because none was opened.

kind regards,

Jos

[r035198x]

MS Windows uses 'file type associations'; when you click on any file, the
associated program is searched and if found your file is used as an argument
for the associated program.

There are two variations for the virtual machine: java.exe and javaw.exe. The
first opens a console for your jar's standard input, output and error streams.
The second doesn't open a console. If the second program is associated with
the .jar file type you can't see a console because none was opened.

kind regards,

Jos

Look who just bought a faster keyboard.

[amitpathak]

If you're using windows then the program that you have associated with jars (default program for running jar files) is javaw.exe instead of java.exe. javaw.exe does not have the console so any output from your program that's supposed to go to the console is not displayed. Simply change the default program for opening jars to be java.exe

Okay Now I understood

But I am sorry I donno How to change the default program to run JAR Files
Please tell me.

[r035198x]

Okay Now I understood

But I am sorry I donno How to change the default program to run JAR Files
Please tell me.

Deepends on which version of windows you're using.
On my vista I simply right click the file, and then click change on its "Open with" tab.

[JosAH]

Look who just bought a faster keyboard.

:-P but my reply contains more text; so there ;-)

kind regards,

Jos