Question

print palindrome words in a given sentence and frequency of palindrome words.

				
					Palindrome words are words that are the same backward and forward.

example:

pop reads same, backward or forward

mom reads same, backward or forward.


Enter a sentence
mom and dad are not at home
Palindrome words in sentence:
mom
dad
Number of palindrome words in given sentence:2

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Code

				
					import java.util.Scanner;
public class palindromeWordsAndFrequencyInSentence 
{  
    public static void main(String[] args)
    {  
        String sen="",wd="",wd1="";
        char ch=' ',lastCharacter=' ';
        int i=0,len=0,palindromeWordFrequency=0;
        Scanner sc = new Scanner(System.in);            
        System.out.println("Enter a sentence");   
        sen = sc.nextLine(); 
        len=sen.length();
        lastCharacter=sen.charAt(len-1);
        if(lastCharacter!='.')
        {
            sen=sen+".";
            len++;
        }
        System.out.println("Palindrome words in sentence:");   

        for(i=0;i< len;i++)
        {
            ch=sen.charAt(i);
            if(ch==' '||ch=='.')
            {
                if(wd.equalsIgnoreCase(wd1)==true)
                {
                    System.out.println(wd);
                    palindromeWordFrequency++;
                }
                wd1="";
                wd="";                
            }
            else
            {
                wd=wd+ch;
                wd1=ch+wd1;
            }
        }
        System.out.println("Number of palindrome words in given sentence:"+palindromeWordFrequency);
    }  
}