I have a JAR with 4 classes, each one has Main method. I want to be able to run each one of those as per the need. I am trying to run it from command-line on Linux box.
E.g. The name of my JAR is MyJar.jar
It has directory structure for the main classes as follows:
com/mycomp/myproj/dir1/MainClass1.class com/mycomp/myproj/dir2/MainClass2.class com/mycomp/myproj/dir3/MainClass3.class com/mycomp/myproj/dir4/MainClass4.class
I know that I can specify one class as main in my Manifest file. But is there any way by which I can specify some argument on command line to run whichever class I wish to run?
I tried this:
jar cfe MyJar.jar com.mycomp.myproj.dir2.MainClass2 com/mycomp/myproj/dir2/MainClass2.class /home/myhome/datasource.properties /home/myhome/input.txt
And I got this error:
com/mycomp/myproj/dir2/MainClass2.class : no such file or directory
(In the above command, ‘/home/myhome/datasource.properties’ and ‘/home/myhome/input.txt’ are the command line arguments).
You can create your jar without Main-Class in its Manifest file. Then :
java -cp MyJar.jar com.mycomp.myproj.dir2.MainClass2 /home/myhome/datasource.properties /home/myhome/input.txt