Data Structures and Algorithms in Java[1].pdf - Fulvio Frisone

n.longValue( )
float
Float
n = new Float(3.934F);
n.floatValue( )
double
Double
n = new Double(3.934);
n.doubleValue( )
String Objects
A string is a sequence of characters that comes from some alphabet (the set of all
possible characters). Each character c that makes up a string s can be referenced
by its index in the string, which is equal to the number of characters that come
before c in s (so the first character is at index 0). In Java, the alphabet used to
define strings is the Unicode international character set, a 16-bit character
encoding that covers most used written languages. Other programming languages
tend to use the smaller ASCII character set (which is a proper subset of the
Unicode alphabet based on a 7-bit encoding). In addition, Java defines a special
built-in class of objects called String objects.
For example, a string P could be
"hogs and dogs",
which has length 13 and could have come from someone's Web page. In this case,
the character at index 2 is 'g' and the character at index 5 is 'a'. Alternately, P
could be the string "CGTAATAGTTAATCCG", which has length 16 and could
have come from a scientific application for DNA sequencing, where the alphabet
is {G, C, A, T}.
Concatenation
String processing involves dealing with strings. The primary operation for
combining strings is called concatenation, which takes a string P and a string Q
combines them into a new string, denoted P + Q, which consists of all the
characters of P followed by all the characters of Q. In Java, the "+" operation
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