اكتب طريقة لايجاد عدد تكرار الحرف O فى الفقرة. اكتب طريقة لتعيد معكوس هذه الفقرة. استبدال الكلمة clever بالكلمة Genius

class Egy {
public int countChar(String str, char litter)
{
    int count = 0;
    for(int i=0; i < str.length(); i++)
    {    if(str.charAt(i) == litter)
            count++;
    }     
    return count;
} 
public StringBuilder getreverse(String str)
{   
   StringBuilder input1 = new StringBuilder();
   input1.append(str); 
   input1 = input1.reverse();       
    return input1;
} 
}
public class Test1 {  
    public static void main(String[] args) {       
        String input = "you are the best and clever students i've ever met.you are just need little concentrates and find right way to read your subjects"; 
        char c ='o';         
        Egy b = new Egy() ;
        String replaceString=input.replaceAll("clever","Genius");
        System.out.println("Number of repeat character a 'O' is: "+ b.countChar(input, c));
        System.out.println("Inverse paragraph is:" + b.getreverse(input));    
        System.out.println(replaceString);          
    }
}