title: How to fix: "the type java.lang.CharSequence cannot be resolved. It is indirectly referenced from required .class files" message?
body: <p>I'm trying to use this string </p>
  
  <pre><code>amountStr = amountStr.replace("$", "").replace(" ", "").replace(",", ""); 
  </code></pre>
  
  <p>but I get an error message which I know I'm getting because that string I just posted is outdated. So I was wondering what would be a good updated version of that string? here is how my whole code looks like.</p>
  
  <pre><code>import java.util.Scanner;
  
  public class QuarterMachine{
  
      /**
       * Convert the input to cents.
       */
  
      public static void main(String[] args){
  
          // PART I INPUT SECTION (COMPLETE)
          // DO NOT CHANGE THESE LINES
  
          Scanner cin = new Scanner(System.in);
          System.out.print("Part I-Enter the amount input ($ 1,572.52): ");
          String amountStr = cin.nextLine();
  
          // PLACE YOUR CODE ONLY BELOW THIS LINE
          // PLACE YOUR OUTPUT IN THESE VARIABLES
  
          // ---------- YOUR CHANGES HERE ----------------------
  
          double amount = 0;
          int quarters = 0;
  
  //My problem is in line below
          amountStr = amountStr.replace("$", "").replace(" ", "").replace(",", "");
  
          amount = Double.parseDouble(amountStr);
          quarters = (int) (amount * 100) / 25;
  
          // PLACE YOUR CODE ONLY ABOVE THIS LINE
          // PART I OUTPUT SECTION COMPLETE
  
          System.out.printf("Amount received($%,.0f), quarters returned(%,d)%n%n",amount, quarters);
  
          // PART II INPUT SECTION (COMPLETE)
  
          System.out.print("Part II-Enter seconds, minutes and hours as integers: ");
          int seconds = cin.nextInt();
          int minutes = cin.nextInt();
          int hours = cin.nextInt();
  
          // PLACE YOUR CODE ONLY BELOW THIS LINE
          // PLACE YOUR OUTPUT IN THIS VARIABLE
  
          String result = String.format("%02d:%02d:%02d", hours, minutes, seconds);
  
          // YOUR CODE MUST GO ABOVE THIS LINE
          // PART II - OUTPUT SECTION COMPLETE
  
          System.out.println("Result: " + result);
      }
  }
  </code></pre>