We are using java language to solve your queries-

import java.util.*;
public class RemoveCharFromString
 {
    public static void main (String [] args)
        {
       Scanner sc=new Scanner(System.in);
             System.out.println("Enter Any String  : "); 
         String str=sc.nextLine();
             System.out.println("Enter Any Character Which You Want to remove  : ");
        char ch = sc.next().charAt(0);
          System.out.println (removeCharInString (str,  ch));
       }
/* Here is a method which will remove any given character from a String   */
  public static String removeCharInString (String string, char charToBeRemoved) {
        if (string == null)
             return "";
         StringBuilder strBuild = new StringBuilder ();
        for (int i = 0; i < string.length (); i++) {
            char chr = string.charAt (i);
            if (chr == charToBeRemoved)
                continue;
            strBuild.append (chr);
        }
        return strBuild.toString ();
    }
}