/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	 public static void main(String[] args) throws IOException
    {
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        char letter;
        String sentence;
        int counter = 0;
        char response = 'o';
 
        do
        {
            System.out.println("Type a sentence: ");
            sentence = input.readLine();
            System.out.println("Type a character to find: ");
            letter = (char) input.read();
 
            for(int x=0;x<sentence.length();x++)
            {
                if(letter==sentence.charAt(x))
                {
                    counter++;
                }
            }
 
            System.out.println("Number of times " + letter + " occured is: " + counter);
            System.out.println("Continue? [y/n]: ");
            response = (char) input.read();
            System.out.println(">" + response + "<");
 
        }while(response != 'n');          
    }        
}

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dGVzdAp0CnkKZm9vCmYKbg==

test
t
y
foo
f
n