These questions will be answnered under Java language.

1. How to sort an array of integer or strings or chars. 2. Find out prime numbers. 3. How to print patterns like * ** *** **** 4. Calculate Circle Area using Java Example 5. Calculate Circle Perimeter using Java Example 6. Calculate Rectangle Area using Java Example 7. Calculate Rectangle Perimeter using Java Example 8. Even Odd Number Example 9. Find Largest and Smallest Number in an Array Example 10. Java Factorial Example 11. Java Factorial Using Recursion Example 12. Reverse Number using Java 13. Swap Numbers Java Example 14. Swap Numbers Without Using Third Variable Java Example 15. How to correctly identify if the string is Email or Not(Regex) 16. Write a java program to prove that strings are immutable in java? 17. How do you find first repeated and non-repeated character in the given string in java? 18. Fibbonacci 19. Given String is Palindrome or not 20. How to print first non repeated character in the String?