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When trying to build a logical “and” operation the usage of regular expressions, we have some methods to comply with. the primary approach can also appear obvious, but in case you reflect onconsideration on it normal expressions are logical “and” through default. each sequential individual in a normal expression is “and’ed” together. The way to validate a password the usage of regular expressions in java. given a password, the mission is to validate the password with the help of everyday expression. a password is considered valid if all the following constraints are happy: it includes at the least eight characters and at maximum 20 characters. A regex, or everyday expression, is a sequence of characters that bureaucracy a seek pattern. regex may be used to test if a string contains the required search sample. Take into account a easy ordinary expression that is intended to extract the closing 4 digits from a string of numbers which includes a credit score card variety. the version of t...