Q:
I am unable to get an idea how to make these projects executable on any platform without using any of Java utility like ('javac' or 'java').
A:
If you need a platform independent implementation of a Java application, that does not involve input/output operations, it is possible to reshape your program into an Applet application.
Then you'd embed it in a .html webpage containing the applet that should be opened in a browser. This is easy to send to and to use by anybody connected to the internet.
But what you ask for: a true Java application with an easy way to employ it - preferably by an icon on the desktop - I cannot tell you... I guess Sun offers the Java Web Start to use Java applications like beans, but I don't think Ivor Horton says anything about it in his wonderful book...
Ask the developers' forum at
www.sun.com, they'd know, the sun website holds a lot of information about questions like this, as they involve us all one day...
Francis @ chapter15