Java Reference
In-Depth Information
int
largest = arg[0];
for
(
int
i = 1; i < arg.length; i++)
if
(arg[i] > largest)
largest = arg[i];
return
largest;
}
This method
max
works by taking its
int
arguments and placing them in an array
named
arg
whose base type is
int
. For example, suppose this definition of the method
max
is in a class named
UtilityClass
, and consider the following method call:
int
highestScore = UtilityClass.max(3, 2, 5, 1);
The array
arg
is automatically declared and initialized as follows:
int
[] arg = {3, 2, 5, 1};
So
arg[0] == 3
,
arg[1] == 2
,
arg[2] == 5
, and
arg[3] == 1
. After this, the code in
the body of the method definition is executed. Display 6.7 shows a sample program
that uses this method
max
.
Note that a method, such as
max
, that takes any number of arguments is basically
a method that takes an array as an argument, except that the job of placing values in
the array is done automatically for the programmer. The values for the array are
Display 6.7
Method with a Variable Number of Parameters
(part 1 of 2)
1
public class
UtilityClass
2{
3
/**
4
Returns the largest of any number of int values.
5
*/
6
public static int
max(
int
... arg)
7
{
8
if
(arg.length == 0)
9
{
10
System.out.println("Fatal Error: maximum of zero values.");
11
System.exit(0);
12
}
13
int
largest = arg[0];
14
for
(
int
i = 1; i < arg.length; i++)
15
if
(arg[i] > largest)
16
largest = arg[i];
This is the file
UtilityClass.java
.
17
return
largest;
18
}
19
}
20
(continued)
