[Solved] A program to remove duplicates from given array of N elemets

Write JAVA program to –

1. Remove duplicates from given array of N elemets. (Hint Create Hashset and store in it) – as Set automatically removes duplicate.

Example : Input > {3, 5, 2, 2, 5, 6, 7 ,8,3, 5 }Output > {3, 5, 2, 6, 7 ,8 }

2. Reverse a String.

Example : Input > “Hello world!”Output > “!dlrow olleH”

3. Reverese words in a string.Example : Input > “Hello world!”Output > “world! Hello”

4. Check if entered string is Palindrome or not (a word, phrase, or sequence that reads the same backward as forward)

Example : Input > “madam”Output > Give string is Palindrome

Example : Input > “sir”Output > Give string is Not Palindrome

5. Design a stack that supports push, pop, and retrieving the minimum element in constant time O (1).