Making of executable jar by using "jar" utility in jdk

Hi,

We can make the jars and executable jars by using the  "jar" utility present in the jdk as under:

1. Create the class having the main() method in package say main.pckage.MainClass.java
2. Create another class having any method in package say com.other.pckage.OtherClass.java.
3. Compile both classes.
4. Create a text file say manifest.txt and write the Main-Class: main.pckage.MainClass
5. Now we have two main folder main and com containing the .class files and one manifest.txt file.
6. Put all these in one folder say "Executable Jar".
7. I assume that you set the java path variable.
8. Open the command prompt and paste the
cmd-->  C:\Users\Rajan Bansal\Desktop\Executable Jar>jar cvfm myjar.jar manifest.txt com
/other/pckage/*.class main/pckage/*.class
 and the output is:
cmd--> added manifest
adding: com/other/pckage/OtherClass.class(in = 547) (out= 344)(deflated 37%)
adding: main/pckage/MainClass.class(in = 754) (out= 454)(deflated 39%)

Now we have successfully created the executable jar file in cmd.

Now write cmd--> java -jar myjar.jar
It will execute the main method of MainClass.java

And we can use that jar in any of our projects.

For more info click here..