thanks prof. !

i understand how the java snytax works now

cut and paste:

into constraints page:

s_vx =[color=blue][b]"vx="[/b][/color]+(int)(vx*100.+0.5)/100.+[b][color=red]"m/s"[/color][/b] ;

into view property text

%s_vx%

Thanks for help,

When you come to sg can meet up with me ? :) i need to buy coffee. really learnt alot from you and this forum.