Respuesta :
Answer:
Following are the code to these questions:
import java.util.*;//import package for user input
public class Main//defining a class
{
public static void main(String ab[])//defining main method
{
ArrayList<String> Val1 = new ArrayList<String>();//defining an ArrayList val
Val1.add("lunch");//use add method for add value
Val1.add("dinner");//use add method for add value
if(isPalindrome(Val1))// use if block to call method isPalindrome that accepts an array
{
System.out.println("Word in the list is palindrome.");//print message
}
else//defining else block
{
System.out.println("Word in the list is not a palindrome.");//print message
}
Iterator i1 = Val1.iterator();//creating iterator object to hold ArrayList value
while(i1.hasNext())//defining loop for count value
{
System.out.println(i1.next());//print value
}
}
public static<T> boolean isPalindrome(ArrayList<T> l)//defining method isPalindrome
{
if(l.size() == 0 || l.size() == 1)//defining if block that check size value
return true;//return value
ArrayList<T> la = new ArrayList<T>(l.subList(1, l.size()-1));//defining an ArrayList la
return l.get(0).equals(l.get(l.size()-1)) && isPalindrome(la);//return value of ArrayList
}
}
Output:
Word in the list is not a palindrome.
lunch
dinner
Explanation:
In the above code, an array list Val1 is declared, which uses the add method to store string value and after that, it uses a conditional statement to check its palindrome value. To check this, it defined a method that is "isPalindrome", that accepts a string value and check by the given code and return its value.
