获取java中特定位置的两个字符之间的字符串

I need to extract a number between two underscores. This has to be dynamic. That means , I need the string between 4th and 5th underscore from the left. Ex: gcw_distributor_ams_200_20180419_13_10_57.enrich The string I need is 200I need to extract a number between two undersco