Question

Given a string, print the first word which has its reverse word further ahead in the string. Input Format: A string of space separated words, ending with a 's'. Conditions ; Each string ends with a $ character. All characters in the string are either spaces. $ or lower case English alphabets, Output Format : In a single line pent either . The first word from the start of the string which has its reverse also present in the string. • The 's' character, if no such word is present. Input asked you a deksas Output asked

PLEASE WRITE SIMPLE JAVA PROGRAM AND ALSO EXPLAIN THE LOGIC.

Answer 1

The explanation of the logic is given line by line in the below Java program:

public class Main
{
   public static void main(String[] args)
   {
   //initialize a string variable
String str = "asked you a deksa$";
  
//remove the last character $ from the input string
str = str.substring(0, str.length() - 1);
  
//break the input string into an array of word
String[] words = str.split(" ");
  
//calculate teh size of an array of word
int len = words.length;
  
//create an array of reverse word
String[] reverseWord = new String[len];
  
//initialize an array of reverse word
for(int i=0; i<len; i++)
{
reverseWord[i] = new StringBuilder(words[i]).reverse().toString();
}
  
//check if the any word is equal in both the array of word and arrry of reverse word
for(int i=0; i<len; i++)
{
for(int k=i+1; k<len; k++)
{
//check if word and reverse word are equal
if(words[i].equals(reverseWord[k]))
{
//if reverse word is found then print that word on the computer screen
System.out.println("\nThe reverse word found of this word: "+ words[i]);
  
//exit the program
System.exit(1);
}
}
}
  
//if reverse word id not found then print $ on the computer screen
System.out.println("$");
   }
}

OUTPUT:

The reverse word found of this word: asked