In java how to get substring from a string till a character c?

Question

I have a string (which is basically a file name following a naming convention) abc.def.ghi

I would like to extract the substring before the first

Answer 1

In java.lang.String you get some methods like indexOf(): which returns you first index of a char/string. and lstIndexOf: which returns you the last index of String/char

From Java Doc:

  public int indexOf(int ch)
  public int indexOf(String str)

Returns the index within this string of the first occurrence of the specified character.