String ReplaceAll

[manoj kumar jena]

System.out.println("12.0".replaceAll(".0",""));

The above line prints 12 but the following line prints a blank string, why? it should print 10.
:!:
System.out.println("10.0".replaceAll(".0",""));

[Punit Singh]

manoj kumar jena wrote:System.out.println("12.0".replaceAll(".0",""));

The above line prints 12 but the following line prints a blank string, why? it should print 10.
:!:
System.out.println("10.0".replaceAll(".0",""));

replaceAll(regex,replacementString); this function uses regular expression for matching.
For ".0" : dot means any character in regular expression, 0 means 0, so regex engine will try to find anycharacter ending with 0.
In first try it will find 10--------> 1 character ending with 0
in Second try it will find .0------> . character ending with 0.

[Henry Wong]

And as a side note... the correct regex for what you want is...

System.out.println("10.0".replaceAll("\\.0",""));

Henry

[Bauke Scholtz]

If you aren't going to take benefit from regexps, but just want to do a replace of the exact plain vanilla value, just use String#replace() instead. Requires at least Java 1.5 though.

[manoj kumar jena]

Thank you very much to all of you for your immediate and valuable response