从字符串中删除最后一个“。”字符而不在中间删除

Question

I am reading a text file and create a excel file using it. I managed to do the conversion. But there is a description filed with one or two full-stop(.) that I wanna remove. Some times there may be have one full-stop, may be have two or may be no full-stop. I tried with using replace but it also remove the (.) inside/middle of the text. I don't wanna do that.

These are some samples

P/NO 9281195 . .                                 
TFR TO 202 . .                                                               
E/C 21118 GTLA/0267/0044505 NI                                                    
9259589 .PMGN JAYARATHNE .                       
GTLA/0267/0044505 662881724V .  

What I want is

P/NO 9281195                              
TFR TO 202                                                            
E/C 21118 GTLA/0267/0044505 NI                                                    
9259589 .PMGN JAYARATHNE                
GTLA/0267/0044505 662881724V

Answer 1

1. Solution :

   You can use a regex that'll match some couple (space point) at the end, and replace this by nothing

    String line = "P/NO 9281195 . ."; line = line.replaceAll("(\\\\s*\\\\.)+$", ""); 

2. Details :

   • \\s* for 0 to unlimited space
   • \\. for a point
   • (\\\\s*\\\\.)+ for 1 to unlimited couples of space/point
   • $ match at the end

Answer 2

Try it

str.replaceAll("(\\.|\\s)+$", "")

This regex will match any . character or any space at the end of the line. So you just need to replace it with empty string.