Here is a java example that accepts a sentence from the user and a character. It then count the occurrence of that character in the string and display the words that contains that character.

import java.util.*;

public class String_Example {
        public static void main(String[] args) {
            Scanner input=new Scanner(System.in);
            System.out.print("Enter any sentence: ");
            String st=input.nextLine();
            System.out.print("Enter character: ");
            char ch=input.next().charAt(0);
            int count=0;
                StringTokenizer tokenizer = new StringTokenizer(st);
                String s = "";
                System.out.println("Words that contains "+ch);
                while (tokenizer.hasMoreTokens()) {
                        s = tokenizer.nextToken();
                        if (s.contains(Character.toString(ch))){
                            count++;
                                System.out.println(s);
                        }
                }
                  System.out.println(ch+" occurs "+count+" times.");
        }
}

thank you