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  1. 			import java.util.Scanner;
  2.  
  3.  
  4. 					public class CircleStuff {
  5. 						public static void main(String[] args){
  6. 							Scanner myScanner = new Scanner(System.in);
  7. 							//Creates some variables
  8. 							double pi = 3.14159265359;
  9. 							double sum = 0;
  10. 							boolean done = false;
  11.  
  12. 							//while loop to keep asking for new input
  13. 							while (done == false){
  14.  
  15. 							//Asks for input about what you want to do and stores it.
  16. 							System.out.println("Do you want to know the circumference or area of the circle?");
  17. 							String answer = myScanner.nextLine();
  18. 							answer = answer.toLowerCase();
  19.  
  20. 							//Compares the answer to the input of the user and calculates the proper formula corresponding with the input
  21. 							if (answer.equals("circumference")){
  22. 						    	System.out.println("What is the radius of the circle?");
  23. 								double radius = myScanner.nextDouble();
  24. 								String test = myScanner.nextLine();
  25. 						    	sum = radius * pi;
  26. 								System.out.println("The circumference of the circle is: " + sum);
  27. 							}else if (answer.equals("area") ){
  28. 								System.out.println("What is the radius of the circle?");
  29. 								double radius = myScanner.nextDouble();
  30. 								String test = myScanner.nextLine();
  31. 								sum = radius * radius * pi;
  32. 								System.out.println("The area of the circle is: " + sum);
  33. 							}else{
  34. 								System.out.println("I didn't understand \"" + answer + "\", please try again." );
  35. 							}
  36.  
  37. 							//Asks the user if they want to do another calculation and stores the input
  38. 							System.out.println("Do you want to try again?");
  39. 							String answer2 = myScanner.nextLine();
  40. 							answer2 = answer2.toLowerCase();
  41.  
  42. 							//Compares the answer of the input and either continues the loop or breaks it.
  43. 							if (answer2.equals("yes")){
  44. 								done = false;
  45. 							}else if (answer2.equals("no")){
  46. 								done = true;
  47. 							}else{
  48. 								System.out.println("I didn't understand \"" + answer2 + "\", please try again." );
  49. 								answer2 = myScanner.nextLine();
  50. 								answer2 = answer2.toLowerCase();
  51. 							}
  52. 							}
  53. 						}
  54.  
  55. 					}
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:4: error: class CircleStuff is public, should be declared in a file named CircleStuff.java
					public class CircleStuff {
					       ^
1 error
stdout
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Standard output is empty
https://ideone.com/TXFhm6
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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