Java™ How To Program (Early Objects), Tenth Edition

Section 14.3 Class String

• String objects are immutable (p. 599)—after they’re created, their character contents cannot be changed.

• String method length (p. 599) returns the number of characters in a String.

• String method charAt (p. 599) returns the character at a specific position.

• String method regionMatches (p. 601) compares portions of two strings for equality.

• String method equals tests for equality. The method returns true if the contents of the Strings are equal, false otherwise. Method equals uses a lexicographical comparison (p. 602) for Strings.

• When primitive-type values are compared with ==, the result is true if both values are identical. When references are compared with ==, the result is true if both refer to the same ...