Java Exercises Strings and StringTokenizer

Java Exercises - Strings & StringTokenizer
1.Write a program that reads a string and then prints a diamond shaped array based on
the characters of the string. As an example, if the string has the value "SAMPLE", then
the program should print the pattern
S
SAS
SAMAS
SAMPMAS
SAMPLPMAS
SAMPLELPMAS
SAMPLPMAS
SAMPMAS
SAMAS
SAS
S
The program should work for a string up to ten characters long. If a user supplies a
string that is longer than ten characters, the program should use only the first ten
characters in forming the pattern.
2.A palindrome is a string that reads the same both forward and backward. Examples of
palindromes are "radar" and "31413".
(a)Write a boolean-valued method isPalindrome that has a single String parameter.
The method should return true if and only if its parameter is a palindrome.
(b)Modify your method so that it ignores cases of letters, punctuation marks, and
blanks in making a decision about whether or not a string is a palindrome. For
example, the string:
"A man, a plan, a canal: Panama!"
should be taken to be a palindrome.
Write a program that prompts the user for a string and notifies the user if it is a
palindrome.