String.matches（）意外返回false。

Question

I'm trying to write a program that interprets race results. However in order to do this I need to use regex to test if strings match a certain pattern using the String.matches(String regex) method. When using this methods some strings that I expect to return true , return false instead.

Using the following string as the regex pattern, some of the strings return true and other false when the should return true as well:

regex = "[ ]*[1-9]+[ ]+[a-zA-Z]+[ ]+[a-zA-Z]+[ ]+[a-zA-Z]+[ ]?[a-zA-Z]*[ ]?[a-zA-Z]*[ ]?[a-zA-Z]*[ ]?[a-zA-Z]*[ ]?[a-zA-Z]*[ ]?[1-9]+[ ]+[1-9]+[ ]+[0-9:.]+[ ]+"

These are some of the strings that return true with the string.matches(String regex) method:

" 1 Ryan Kepshire Crown Point 31 4 16:31 "
" 2 Matthew Mosak Crown Point 34 4 16:44 "
" 3 Dylan Wallace Crown Point 36 4 16:58 "
" 4 Nicholas Zak Hanover Central 51 6 17:08 "
" 5 Joshua Whitaker Crown Point 37 4 17:16 "
" 8 Collin Allen Hobart 64 8 17:23 "
" 9 Zachary Hoover Crown Point 29 4 17:29 "

These are some of the strings that return false with the string.matches(String regex) method:

" 6 Christopher Ramos River Forest 103 12 17:18 "
" 7 Boyer Hunter Lowell 78 10 17:20 "
" 10 Miguel Tapia Merrillville 98 11 17:32 "

I need help with determining why the bottom three strings fail the regex test while the top 7 pass it.

Answer 1

[ ]*[0-9]+[ ]+[a-zA-Z]+[ ]+[a-zA-Z]+[ ]+[a-zA-Z]+[ ]?[a-zA-Z]*[ ]?[a-zA-Z]*[ ]?[a-zA-Z]*[ 
     ^ 
]?[a-zA-Z]*[ ]?[a-zA-Z]*[ ]?[0-9]+[ ]+[0-9]+[ ]+[0-9:.]+[ ]+
                             ^         ^    

Your regex does not allow 0 in integers.That is why it was failing.See here.

http://regex101.com/r/uH3tP3/5

I have modified it to accept 0 .

Ex. [1-9]+ will not accept 10 .

" 6 Christopher Ramos River Forest 103 12 17:18 " //fails due to 103

" 7 Boyer Hunter Lowell 78 10 17:20 " //fails due to 10

" 10 Miguel Tapia Merrillville 98 11 17:32 //fails due to 10