compro3

is a character or a sequence of characters that represent a string or multiple

strings.

is the wildcard operator that represents any single character in regular expressions.

is any symbol in regular expressions that indicates the number of times a specified

character appears in a matching string.

• repetition operator

• regular expression

• pattern

• matcher

Returns true if str consists of

zero or more A's but no other

letter

• {x}

• +

• ?

• *

0 or 1 occurrence

Returns true if str is "" or "A"

• {x}

• +

• ?

• *

1 or more occurrences

Returns true if str is 1 or more

A's in a sequence

• {x}

• +

• ?

• *

Returns true if str is a

sequence of 7 A's

• {x}

• +

• ?

• *

Between x & y occurrences

Returns true if str is a

sequence of 7, 8, or 9 A's

• {x,}

• {x,y}

• {x}

• {y,}

x or more occurrences

Returns true if str is a

sequence of 5 or more A's.

• {x,}

• {x,y}

• +

• {x}

method is used to replace all the occurrences of the defined regular expression found in

the string with another string.

• replaceAll()

• repetition operator

• regular expression (regex)

• find()