n weight matrix

Can someone teach me an algo on how to construct an nxm bit matrix (I mean here a matrix composed only of 1 and 0). Whose columns have a weight n. Example 1 0 1 0 1 0If you add up columnwise then the weight is n. God day and God bless!
[263 byte] By [czetsuyaa] at [2007-10-2 0:04:30]
# 1
http://forum.java.sun.com/thread.jspa?messageID=3890859
prometheuzza at 2007-7-15 16:03:57 > top of Java-index,Other Topics,Algorithms...
# 2
NOW this is getting bad it was bad when people crossposted but now they are cross cross posting. What are we going to do..you know that i dont know which thread to reply to. and you know somthing i am not going to help you.... stop the posting untill you can get one right!!
Nibura at 2007-7-15 16:03:57 > top of Java-index,Other Topics,Algorithms...