Getting a class From a String in Java

MRMadhav · 02-14-2006, 12:25 PM

Hi,
I am writing an application that reads a text file and reads each line in a different string, then that program should read that string and load the class that has exactly the name that is contained in the string(the class always exists). Now my problem is that i need to find a way to load the class, whose name equals to the string contents, automatically and without and other condition like the switch case conditions or else if conditions which are lenghty and which can create problems when the text file becomes really long.

Any one can help?????

jlliagre · 02-14-2006, 02:04 PM

Quote:

Originally Posted by MRMadhav

Hi,
I am writing an application that reads a text file and reads each line in a different string, then that program should read that string and load the class that has exactly the name that is contained in the string(the class always exists).

That's easy.

Quote:

Now my problem is that i need to find a way to load the class, whose name equals to the string contents, automatically and without and other condition like the switch case conditions or else if conditions which are lenghty and which can create problems when the text file becomes really long.

Any one can help?????

is this your homework ?
Can you elaborate about why writing structured programs create problems ?

MRMadhav · 02-14-2006, 11:04 PM

Thanks for replying! Well i am trying to generate a menu out of the text file and i wanted to know how to load the classes out of the text(String) from the text file.
If its easy then you will surely be able to help!

jlliagre · 02-16-2006, 05:05 AM

See:
http://java.sun.com/j2se/1.5.0/docs/...a.lang.String)

mrcheeks · 02-17-2006, 08:56 PM

Code:

Object obj = Class.forName(stringClassName).newInstance();
JMenu menu = (JMenu)obj;

MRMadhav · 02-18-2006, 05:50 AM

Thank you all for your answers and Special Thanks to mrcheeks as I used what he gave and that was the solution! Thanks!