//Checking the string is palindrome or not by using stack and queue   class Palindrome { public static void main(String args[]) { String str=”madam”;   Queue<Charcter> q=new LinkedList<>();   Stack<Character> s=new Stack();   for(char ch:str.toCharArray())//ch=m { q.add(ch);//m s.push(ch);//m }   boolean isPalindrome=true;     while(!q.isEmpty())//false { if(q.remove()!=s.pop()) { isPalindrome=false; break; } } if(isPalindrome)//true System.out.println(str +”is […]