Java Reference
In-Depth Information
char
[] createArray()
21
public static
{
22
// Declare an array of characters and create it
23
char
[] chars =
new char
[
100
];
24
25
// Create lowercase letters randomly and assign
26
// them to the array
27
for
(
int
i =
0
; i < chars.length; i++)
28 chars[i] = RandomCharacter.getRandomLowerCaseLetter();
29
30
// Return the array
31
return
chars;
32 }
33
34
/** Display the array of characters */
void
displayArray(
char
[] chars)
35
{
36
// Display the characters in the array 20 on each line
37
for
(
int
i =
0
; i < chars.length; i++) {
38
if
((i +
1
) %
20
==
0
)
39 System.out.println(chars[i]);
40
else
41 System.out.print(chars[i] +
" "
);
42 }
43 }
44
45
public static
/** Count the occurrences of each letter */
46
public static
int
[] countLetters(
char
[] chars)
{
47
// Declare and create an array of 26 int
48
int
[] counts =
new int
[
26
];
49
50
// For each lowercase letter in the array, count it
51
for
(
int
i =
0
; i < chars.length; i++)
52 counts[chars[i] -
'a'
]++;
53
54
increase count
return
counts;
55 }
56
57
/** Display counts */
58
public static
void
displayCounts(
int
[] counts)
{
59
for
(
int
i =
0
; i < counts.length; i++) {
60
if
((i +
1
) %
10
==
0
)
61 System.out.println(counts[i] +
" "
+ (
char
)(i +
'a'
));
62
else
63 System.out.print(counts[i] +
" "
+ (
char
)(i +
'a'
) +
" "
);
64 }
65 }
66 }
The lowercase letters are:
e y l s r i b k j v j h a b z n w b t v
s c c k r d w a m p w v u n q a m p l o
a z g d e g f i n d x m z o u l o z j v
h w i w n t g x w c d o t x h y v z y z
q e a m f w p g u q t r e n n w f c r f
The occurrences of each letter are:
5 a 3 b 4 c 4 d 4 e 4 f 4 g 3 h 3 i 3 j
2 k 3 l 4 m 6 n 4 o 3 p 3 q 4 r 2 s 4 t
3 u 5 v 8 w 3 x 3 y 6 z
