java中的正则表达式； 用其他字符替换字符

Question

I have a String as below:

String toModify= 
    "T600XX MAG4292505 0120153P+000000335.20GBP+000000001.0000+0000335.2001+00000 +000001";

I have to replace 01 written before 2nd dot with 95 .

Expected result of the modified String should be:

String modified= 
    "T600XX MAG4292505 0120153P+000000335.20GBP+000000095.0000+0000335.2001+00000 +000001";

Please note:

1. Position of 01 is not fixed from starting position
2. It is fixed that 01 will come just before 2nd .
3. It is fixed that 01 will come after 2nd +
4. It is fixed that 01 will come after GBP and GBP will come only one time in the String

Answer 1

I used below code and it is working fine

int indexOf2ndDot=toModify.indexOf(".",toModify.indexOf("GBP"));   
toModify =toModify.substring(0,indexOf2ndDot-2)+"95"+toModify.substring(indexOf2ndDot);

If is there any better solution using regex, please suggest.