String
, the loop MUST terminate as soon as
it finds a character in the given String
which is equal to the
given character, without looking at the rest of the characters. However, you
MUST NOT use the break
statement to exit loops.Write a Java class called Factorial
which defines a
main()
method that asks the user to enter a positive
integer n
and displays the factorial of
n
. The factorial of an integer n, denoted n!, is
defined as n * (n-1) * (n-2) * ... * 1 (but note that 0!
is 1).
Write a Java class called Fibonacci
which defines a
main()
method that asks the user to enter a positive integer
n
, and computes the nth Fibonacci number. The
nth Fibonacci number is defined by this formula:
Write a Java class called CheckPrimality
which defines a
main()
method that asks the user to enter a positive integer
n
, and displays whether or not n
is a prime number. A
prime number is an integer which cannot be divided evenly except by 1 and
itself.
Write a Java class called Power
which defines a
main()
method that asks the user to enter a double
base
and a positive integer exponent
,
and displays base
to the power of exponent
. You may
assume that base
and exponent
are not both 0. You
must write the computation yourself; in other words, you MUST NOT use the
Math.pow()
method.
Write a Java class called CountDigits
which defines a
main()
method that asks the user to enter a positive integer
n
, and displays how many digits are in n
.
Write a Java class called Contains
which defines a
main()
method that asks the user to enter a String
s
and a character c
, and displays whether or not
c
occurs in s
. You MUST NOT use any methods
defined in the String
class other than chartAt()
and
length()
.
Write a Java class called CountOccurrences
which defines a
main()
method that asks the user to enter a String
s
and a character c
, and displays the number of times
c
occurs in s
.
Write a Java class called CheckDuplicates
, which defines a
main()
method that asks the user to enter a String
s
, and displays whether or not any character in s
occurs more than once.
Write a Java class called MostOftenOccurring
which takes a
String
s
and displays the character which occurs most
often in String
s
. If there is a tie, display the
character which occurs first in s
among those which occur most
often.
Write a Java class called ToUpperCase
which defines a
main()
method that asks the user to enter String
s
and displays a new String
which contains exactly the
same characters as s
in the same order, except that all lower-case
letters occurring in s
are replaced by their upper-case equivalents
in the result String
. You MUST NOT use any methods defined
in the String
class other than charAt()
and
length()
.
Write a Java class called IsAlphabetPermutation
, which
defines a main()
method that asks the user to enter a
String
s
and displays whether or not s
is
a permutation of the upper case letters in the alphabet.
Write a Java class called OccursHere
, which defines a
main()
method that asks the user to enter two
String
s, superString
, and subString
, as
well as a positive integer position
, and displays whether or not
subString
occurs in superString
at position
position
. You may assume that position
is within the
range [0, superString.length()
- 1]. You MUST NOT use any
methods defined in the String
class other than
charAt()
and length()
.
Write a Java class called OccursAnywhere
, which defines a
main()
method that asks the user to enter two String
s,
superString
and subString
, and displays whether or not
subString
occurs anywhere in superString
. You MUST
NOT use any method defined in the String
class other than
chartAt()
and length()
.
Write a Java class called Substring
, which defines a
main()
method that asks the user to enter a String
s
, a positive integer position
, and a positive integer
number
, and displays a new String
formed by taking the
number
characters of s
starting at position
position
. If there are less than number
characters
between position
and the end of s
, your
main()
method should display a new String
formed by
these characters. You MUST NOT use any methods defined in the
String
class other than charAt()
and
length()
.
Write a Java class called RemoveAll
, which defines a
main()
method that asks the user to enter a String
s
and a character c
, and displays a new
String
consisting of all the characters in s
in the
order in which they appear in s
, but with all occurrences of
c
removed. You MUST NOT use any of the methods defined in
the String
class other than charAt()
and
length()
.
Write a Java class called NumberConsecutiveOccurrences
,
which defines a main()
that asks the user to enter a
String
s
, a character c
, and an
integer position
, and displays the number of occurrences of
c
starting at position position
in s
. For
example, if s
is "abbbbbaaa"
, c
is
'b'
, and position
is 1, then your main()
method will display 5, as there are 5 consecutive occurrences of
'b'
starting at position 1. You may assume that
position
is within the range [0, s.length()
- 1]. You
MUST NOT use any methods defined in the String
class other
than charAt()
and length()
.
Write a Java class called MaxConsecutiveOccurrences
, which
defines a main()
method that asks the user to enter a
String
s
and a character c
, and displays
the position in s
at which the longest series of consecutive
occurrences of c
occurs. If there is a tie between two positions,
you should return the lowest position. You MUST NOT use any of the
methods defined in the String
class other than
charAt()
and length()
.
Write a Java class called Reverse
, which defines a
main()
method that asks the user to enter a String
s
, and displays a new String
consisting of the
characters in s
in the reverse order. You MUST NOT use any
methods defined in the String
class other than
charAt()
and length()
.
Write a Java class called IsPalindrome
, which defines a
main()
method that asks the user to enter a String
s
, and displays whether or not s
is a palindrome. A
palindrome is a String
which reads the same forwards and backwards,
such as "laval"
or "stressed desserts"
.
Write a Java class called KillWhiteSpace
, which defines a
main()
method that asks the user to enter a String
s
, and displays a new String
consisting of all the
characters in s
, but with the leading and trailing white space
removed. In addition, every sequence of spaces within the String
is
reduced to one space only. You MUST NOT use any methods defined in the
String
class other than charAt()
and
length()
.
Write a Java class called Equals
, which defines a
main()
method that asks the user to enter two String
s
s1
and s2
, and displays whether or not s1
and s2
are equal. Two String
s are equal if they are of
the same length and the same characters appear in the same positions. You
MUST NOT use any of the methods defined in the String
class
other than charAt()
and length()
.
Write a Java class called DestroyAllOccurrences
, which
defines a main()
method that asks the user to enter two
String
s superString
and subString
, and
displays a new String
consisting of all characters in
superString
with all occurrences of subString
deleted.
You MUST NOT use any of the methods defined in the String
class other than charAt()
and length()
.
Write a Java class called SubSet
, which defines a
main()
method that asks the user to enter two String
s
superString
and subString
, and displays whether or not
all the characters of subString
occur anywhere in
superString
. You MUST NOT use any of the methods defined in
the String
class other than charAt()
and
length()
.
Write a Java class called AppearInOrder()
, which defines a
main()
method that asks the user to enter two
String
s subString
and superString
, and
displays whether or not all the characters of subString
appear in
order in superString
. You MUST NOT use any of the methods
defined in the String
class other than charAt()
and
length()
.
Write a Java class called CountWords
, which defines a
main()
method that asks the user to enter a String
s
, and displays the number of words in s
. A word is
delimited by one or many space characters. You MUST NOT not use any of
the methods defined in the String
class other than
charAt()
and length()
. In addition, you MUST
NOT use the StringTokenizer
class.