Regular Expression to match 3 or more Consecutive Sequential Characters and Consecutive Identical Characters

Question

I need regular expressions to match the below cases.

1. 3 or more consecutive sequential characters/numbers; e.g. 123, abc, 789, pqr, etc.
2. 3 or more cons

Answer 1

for the second question:

\\b([a-zA-Z0-9])\\1\\1+\\b

explanation:

\\b               : zero-length word boundary
  (               : start capture group 1
    [a-zA-Z0-9]   : a letter or a digit
  )               : end group
  \\1             : same character as group 1
  \\1+            : same character as group 1 one or more times
\\b               : zero-length word boundary