Java Reference
In-Depth Information
both an
int
(implicitly) and a
short
(explicitly). The
int
is a positive value
equal to
0x0000ffff
, because the upper bits of the character were set to
zero. But the same bits in the
short
are a negative value, because the
top bit of the
short
is the sign bit:
class CharCast {
public static void main(String[] args) {
int i = '\uffff';
short s = (short) '\uffff';
System.out.println("i = " + i);
System.out.println("s = " + s);
}
}
And here is the program's output:
i = 65535
s = -1
9.4.3. String Conversions
One special type of implicit conversion involves both the primitive and
reference types: string conversion. Whenever a
+
operator has at least
one
String
operand, it is interpreted as the string concatenation oper-
ator and the other operand, if not a
String
, is implicitly converted into
a
String
. Such conversions are predefined for all primitive types. Ob-
jects are converted via the
toString
method, which is either inherited
from
Object
or overridden to provide a meaningful string representation.
For example, the following method brackets a string with the guillemet
characters used for quotation marks in many European languages:
