Thread: JOptionPane Stops working after user input

It works to the point that the user inputs "c" "s" or "r" then it does nothing else ? I can get it to run in my terminal window but when I try to get the JoptionPane windows to work it freezes up.

  import java.util.*; // For Scanner
import java.lang.String.*; // For toUpperCase()
import javax.swing.JOptionPane; // for cute lil java windows
 
public class CaculateAreaOpt {
  // Declare all variables needed for program
  public static Scanner in = new Scanner(System.in);
  public final static double radius = 3.14;
  public static char input;
  public static double area;
  public static double circumference;
  public static double length;
  public static double height;
  public static String str, error;
 
  public static double getArea(double x, double y) {
  // Char inputted by user then each case evaluates area
if (input == 'C') {
    JOptionPane.showInputDialog(
        null,"Enter circumference");
      circumference = in.nextDouble();
      area = radius * circumference;
} // end input c
 
 
 else if (input == 'R'){
      JOptionPane.showInputDialog(
        null,"Enter length of rectangle");
      length = in.nextDouble();
 
   JOptionPane.showInputDialog( 
   null,"Enter height of rectangle");
      height = in.nextDouble();
      area = length * height;
  }// end input R
 
    else if (input == 'S') {
     JOptionPane.showInputDialog(
        null, "Enter length of side");
        length = in.nextDouble();
      area = length * length;
// end input S
  }// end input S
    // return the area
    return area;
  }
 
  /*
   * Method takes two double arguments
   */
 
  public static void main(String[] args) {
    // Get User to choose what shape to calculate Area of
 
JOptionPane.showInputDialog(
        null,"Calculate the Area of a Square, Rectangle or Circle-Press S for square, R for Rectangle, or C for Circle");
    // String str takes Scanner in (next() value
    str = in.next();
    /* String str is an array, so index 0 is first character
     * Thus index 0 is first character
     * Character.toUpperCase converts the String to uppercase
     * so you don't have to test for c, s, or r instead of C, S, R
     */
    input = Character.toUpperCase(str.charAt(0));
 
    /* if / else if 
     * call the getArea() 
     */
    if (input == 'C') {
      getArea(radius, circumference);
   JOptionPane.showInputDialog(
        null,"The area of your circle is " + area);
    } // end area c
    else if (input == 'S') {
      getArea(length, length);
   JOptionPane.showInputDialog(
        null,"The area of your square is " + area);
    } // end area s
    else if (input == 'R') {
      getArea(length, height);
 
   JOptionPane.showInputDialog(
        null,"The area of your rectangle is " + area);
    } // end area r
    else {
      System.out.println(error);
    } // end error
  } //end main()
} // end class

when i use the println() it works perfectly but I am supposed to use the JOptionPane

It stops when the user enters the choice "c" "r" or "s"
I put the JOptionPane on the error statement at the end.. still its stopping and not coming up with any kind of an error

--- Update ---

It stops when the user enters the choice "c" "r" or "s"
I put the JOptionPane on the error statement at the end.. still its stopping and not coming up with any kind of an error

import java.util.*; // For Scanner
import java.lang.String.*; // For toUpperCase()
import javax.swing.JOptionPane; // for cute lil java windows
 
public class CaculateAreaOpt {
  // Declare all variables needed for program
  public static Scanner in = new Scanner(System.in);
  public final static double radius = 3.14;
  public static char input;
  public static double area;
  public static double circumference;
  public static double length;
  public static double height;
  public static String str, error;
 
  public static double getArea(double x, double y) {
  // Char inputted by user then evaluates area
if (input == 'C') {
    JOptionPane.showInputDialog(
        null,"Enter circumference");
      circumference = in.nextDouble();
      area = radius * circumference;
} // end input c
 
 
 else if (input == 'R'){
     JOptionPane.showInputDialog(
        null,"Enter length of rectangle");
      length = in.nextDouble();
 
   JOptionPane.showInputDialog( 
   null,"Enter height of rectangle");
      height = in.nextDouble();
      area = length * height;
  }// end input R
 
    else if (input == 'S') {
    JOptionPane.showInputDialogg(
        null, "Enter length of side");
        length = in.nextDouble();
      area = length * length;
// end input S
  }// end input S
    // return the area
    return area;
  }
 
  /*
   * Method takes two double arguments
   */
 
  public static void main(String[] args) {
    // Get User to choose what shape to calculate Area of
 
JOptionPane.showInputDialog(
        null,"Calculate the Area of a Square, Rectangle or Circle-Press S for square, R for Rectangle, or C for Circle");
    // String str takes Scanner in (next() value
    str = in.next();
    /* String str is an array
     *  0 is first character
     * Character.toUpperCase converts the String to uppercase
     * so you don't have to test for c, s, or r instead of C, S, R
     */
    input = Character.toUpperCase(str.charAt(0));
 
    /* if / else if 
     * call the getArea() 
     */
    if (input == 'C') {
      getArea(radius, circumference);
 
  JOptionPane.showMessageDialog(
   null,"The area of your circle is " + area);
    } // end area c
    else if (input == 'S') {
      getArea(length, length);
 
   JOptionPane.showMessageDialog(
        null,"The area of your square is " + area);
    } // end area s
    else if (input == 'R') {
      getArea(length, height);
 
 JOptionPane.showMessageDialog(
        null,"The area of your rectangle is " + area);
    } // end area r
    else {
JOptionPane.showMessageDialog(error);
    } // end error
  } //end main()
} // end class

No I am still working on it ..Thank you ..
It is wanting me to make the variables data type =string. so I have to convert to int.. this is quite difficult...
public final static double radius = 3.14;
public static char input;
public static String inputStr;
public static double area;
public static String areaStr;
public static double circumference;
public static String circumferenceStr;
public static String heightStr;
public static String widthStr;
public static String areaStr;
public static double length;
public static String lengthStr;
public static double height;
public static String str, error;

Exception in thread "main" java.lang.NumberFormatException: For input string: "S"
at java.lang.NumberFormatException.forInputString(Num berFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:492)
at java.lang.Integer.parseInt(Integer.java:527)
at Area.main(Area.java:14)

import javax.swing.JOptionPane;
 
 
public class Area
{
  public static void main(String args[]) {
    String first,second;
    String choice;
    double radius,width,area,length;
    String value = " "; //intialize the string
    value = JOptionPane.showInputDialog("Please chose one of the options:"+"\n"+"a)Enter C to calculate the area of the Circle"+"\n"+"b)Enter S to calculate the area of the Square"+"\n"+"d)Enter R to calculate the area of the Rectangle"+"\n"+"e)Enter E to exit the program");
    int i;
 
    i = Integer.parseInt(value);
    while (i != 'E') {
 
			 if (i == 'C') { //calculate the area of circle
        first = JOptionPane.showInputDialog("Enter the value of radius");
 
        radius = Double.parseDouble(first);
        area = Math.PI*radius*radius;
        //print out the result
        JOptionPane.showMessageDialog(null,"The area of the Circle:    "+area,"result",JOptionPane.INFORMATION_MESSAGE);
 
        } else
          if (i == 'S') { //calculate the area of square
            first = JOptionPane.showInputDialog("Enter the value of length");
            length = Double.parseDouble(first); //ge string into integer
            area = length*length;
            JOptionPane.showMessageDialog(null,"The area of the square:    "+area," result",JOptionPane.INFORMATION_MESSAGE);
          } else
            if (i =='R') { //calculate the area of rectangle
              first = JOptionPane.showInputDialog("Enter the value of length");
              second = JOptionPane.showInputDialog("Enter the value of width");
              length = Double.parseDouble(first);
              width = Double.parseDouble(second);
              area = width*length;
              JOptionPane.showMessageDialog(null,"The area of the rectangle:     "+area,"result",JOptionPane.INFORMATION_MESSAGE);
            } 
      value = JOptionPane.showInputDialog("Please chose one of the options:"+"\n"+"a)Enter C to calculate the area of the Circle"+"\n"+"b)Enter S to calculate the area of the Square"+"\n"+"d)Enter R to calculate the area of the Rectangle"+"\n"+"e)Enter E to exit the program");
      i = Integer.parseInt(value);
    } //end of while loop
    System.out.println("Program terminated\n");
    System.exit(0);
  } //end of main
}