Create Meta_characters_Rugular_Expressions.java

[chaitanyaj2121]

String Initialization: A string named str1 is initialized with the value "7588212138".

Pattern Matching Tests: The matches() method is used to test whether the string matches certain patterns, and the results are printed to the console. Here's what each line does:

Line 9: Tests if the string matches any single character. Line 11: Tests if the string matches the characters 'a', 'b', or 'c'. Line 13: Tests if the string matches any of the characters 'a', 'b', or 'c'. Line 15: Tests if the string contains any of the characters 'a', 'b', or 'c'. Line 17: Tests if the string matches "abc" followed by zero or more occurrences of 'c'. Line 19: Tests if the string contains any character except 'a', 'b', or 'c'. Line 21: Tests if the string contains any lowercase letter, digit, or uppercase letter. Line 23: Tests if the string consists of digits only. Line 25: Tests if the string consists of zero or more digits. Line 27: Tests if the string consists of exactly 10 digits. Line 29: Tests if the string consists of a character that is not a digit. Line 31: Tests if the string consists of zero or more characters that are not digits. Line 33: Tests if the string contains a whitespace character. Line 35: Tests if the string contains zero or more whitespace characters. Line 37: Tests if the string contains a non-whitespace character. Line 39: Tests if the string contains zero or more non-whitespace characters. Line 41: Tests if the string contains an alphanumeric character. Line 43: Tests if the string contains zero or more alphanumeric characters. Line 45: Tests if the string contains a character that is not alphanumeric. Line 47: Tests if the string contains zero or more characters that are not alphanumeric. The code essentially checks the string against various regular expression patterns to see if they match.