[SOLVED] I need help fixing an error

Can anyone help me fix my error, the error occurs in the red line

import javax.swing.JOptionPane;

public class ShapesCalc {
public static void main(String[] args) {

//Prompt the user to Enter S, C, or T
String shapeString = JOptionPane.showInputDialog("Enter S, C, or T: ");
char shape = line.charAt(shapeString);
switch(shape) {
case 's':;
case 'S': {
String lengthString = JOptionPane.showInputDialog("Enter length of side: ");
double length = Double.parseDouble(lengthString);
//Calculate perimeter and area of square
double perimeter= ( 4 * length);
double area=(length*length);
String output = "Perimeter is equal to: " + perimeter + "\n" + "Area is equal to: " + area;
JOptionPane.showMessageDialog(null,output);
}; break;
case 'c':;
case 'C': {
String radiusString = JOptionPane.showInputDialog("Enter radius: ");
double radius = Double.parseDouble(radiusString);
//Calculate circumference and area of circle
double circumference= (2*3.14*radius);
double area = (Math.PI * (radius * radius));
String output2 ="Circumference is equal to: " + circumference + "\n" + "Area is equal to: " + area;
JOptionPane.showMessageDialog(null,output2);
}; break;
case 't':;
case 'T': {
String baseString = JOptionPane.showInputDialog("Enter length of base: ");
double base = Double.parseDouble(baseString);
String heightString = JOptionPane.showInputDialog("Enter height of triange: ");
double height = Double.parseDouble(heightString);
//Calculate area of triangle
double area = (base * height) / 2;
String output3 = "Area is equal to: " + area;
JOptionPane.showMessageDialog(null,output3);
}; break;
default: {
JOptionPane.showMessageDialog(null,"Incorrect variable please enter S,C, or T only");
System.exit(1);
};
}

what's "line"? what's the error you're getting. what have you tried so far?

class expected
not a statement

i found line on another website i have no idea what it is for

I've tried
char shape = Char.parseChar(shapeString);
double shape = Double.parseDouble(shapeString);
char shape = Char.parseCharAt(shapeString);

The problem is I wrote the whole program in scanner and it worked and then I reread the instructions and found I had to use JOption so i'm having trouble converting over

should be

Code:

---

char shape = JOptionPane.showInputDialog("Enter S, C, or T: ").charAt(0);

---

Try that.
-MK12

As always you are amazing!!! It worked thank you

No problem. Please go to the top of the page and click Thread Tools -> Mark This Thread As Solved.
-MK12

Here's a better approach then doing empty cases:

Code:

---

import java.util.Scanner;

public class ShapesCalc {
    public static void main(String[] args) {
        //Create a Scanner
        Scanner input = new Scanner(System.in);
        double area;

        //Prompt the user to Enter S, C, or T
        char shape =
 Character.toUpperCase(JOptionPane.showInputDialog("Enter S, C, or T: ").charAt(0));
        switch(shape) {
            case 'S': {
                System.out.print("Enter length of side: ");
                double length = input.nextDouble();
                //Calculate perimeter and area of square
                double perimeter= ( 4 * length);
                area=(length*length);
                System.out.println("Perimeter is equal to: " + perimeter + "Area is equal to: " + area);
            }; break;
            case 'C': {
                System.out.print("Enter radius: ");
                double radius = input.nextDouble();
                //Calculate circumference and area of circle
                double circumference= (2*3.14*radius);
                area = (Math.PI * (radius * radius));
                System.out.println("Circumference is equal to: " + circumference + "Area is equal to: " + area);
            }; break;
            case 'T': {
              System.out.print("Enter length of base: ");
                double base = input.nextDouble();
                System.out.print("Enter height of triange: ");
                double height = input.nextDouble();
                //Calculate area of triangle
                area = (base * height) / 2;
                System.out.println("Area is equal to: " + area);
            }; break;
            default: {
                System.out.println("Incorrect variable please enter S,C, or T only");
                System.exit(1);
            };
        }
    }
}

---

notice I made the char uppercase so the lowercase switch cases are no longer necessary. You should split this into methods though, not all in the main. I might show you in another post..
-MK12

Code:

---

import java.util.Scanner;
import javax.swing.JOptionPane;

public class ShapesCalc {
    public ShapesCalc() {
    }
    public static void main(String[] args) {
        ShapesCalc sc = new ShapesCalc();
        sc.calcShape();
    }
    private char getShape() {
        return Character.toUpperCase(
        JOptionPane.showInputDialog("Enter S, C, or T: ").charAt(0));
    }
    private void calcShape() {
        Scanner input = new Scanner(System.in);
        double area;
        switch(getShape()) {
            case 'S': {
                System.out.print("Enter length of side: ");
                double length = input.nextDouble();
                //Calculate perimeter and area of square
                double perimeter= ( 4 * length);
                area=(length*length);
                System.out.println("Perimeter is equal to: " + perimeter + "Area is equal to: " + area);
            }; break;
            case 'C': {
                System.out.print("Enter radius: ");
                double radius = input.nextDouble();
                //Calculate circumference and area of circle
                double circumference= (2*3.14*radius);
                area = (Math.PI * (radius * radius));
                System.out.println("Circumference is equal to: " + circumference + "Area is equal to: " + area);
            }; break;
            case 'T': {
              System.out.print("Enter length of base: ");
                double base = input.nextDouble();
                System.out.print("Enter height of triange: ");
                double height = input.nextDouble();
                //Calculate area of triangle
                area = (base * height) / 2;
                System.out.println("Area is equal to: " + area);
            }; break;
            default: {
                System.out.println("Incorrect variable please enter S,C, or T only");
                System.exit(1);
            };
        }
        input.close();
    }
}

---

I've split it into different methods. Thats a better way of doing it.
-MK12