Remove a random expression from string

Question

I have a string/column something like this

String a = \"000003023_AggregateStopLossLimit_W x3A 973911_2012-12-22.PDF\";

I want to create a subs

Answer 1

Apart from Regex issues in the code you provided, i found it less readable also.

Try following:

int f = a.indexOf(" ");
int l = a.lastIndexOf("_");
a = a.substring(0,f+1) + a.substring(l+1, a.length);