Pfthb

So my main got deleted 2 days ago and my teacher helped me a bit with the switch code. I rebuilt the code yesterday and he was away yesterday and could not help me.

public static void main(String args) throws InterruptedException 


 do 
 try 
 System.out.println("Enter your birthYear");
 birthYear = Integer.parseInt(input.next());
 int length = String.valueOf(birthYear).length();
 System.out.println(length);
 if (length != 4) 
 lengthTest = false;
 System.out.println("Invalid Choice");
 else 
 lengthTest = true;

 
 test = true;

 catch (Exception e) 

 System.out.println("Invalid Choice");
 

 while (test == true ^ lengthTest != false);
 do 
 System.out.println("Please enter a number between 1-4 n"
 + "1 = AreaOfTriangle n" + 
 "----------------------------------n" + 
 "2 = HoursToDaysAndHours Calculator n" + 
 "---------------------------------- n" + 
 "3 = CelciusToFahrenheit Calculator n" + 
 "----------------------------------n" + 
 "4 = BirthdayGame rn" + 
 "----------------------------------");



 try 
 choice = Integer.toString(input.nextInt()).charAt(0);
 System.out.println(choice);
 switch (choice) 
 case 1:
 aOT.areaOfTriangle();
 break;
 case 2:
 hTDAH.hoursToDaysAndHours();
 break;
 case 3:
 cTF.celciusToFahrenheit();
 case 4:
 System.out.println("Code not implemented");
 break;
 case 'e':
 repeat = false;
 break;
 default:
 System.out.println("");
 break;
 
 catch (Exception e) 
 System.out.println("Invalid Awnser");
 

 while (repeat == true);

My problem is in my switch case i want to be able to use int's and Char's at the same time. For example i want to use e to exit and and the 4 numbers

You can try to use String as an input paramenter, then any int value or char will be readed correctly without necessity to convert them:

 try {
 String choice = input.next();
 System.out.println(choice);
 switch (choice) 
 case "1":
 aOT.areaOfTriangle();
 break;
 case "2":
 hTDAH.hoursToDaysAndHours();
 break;
 case "3":
 cTF.celciusToFahrenheit();
 case "4":
 System.out.println("Code not implemented");
 break;
 case "e":
 repeat = false;
 break;
 default:
 System.out.println("");
 break;
 

You can't use int and chars at the same time, as you can only use one variable and a variable has to have a type, but:
If you cast a char or Character to int you get values. For example ((int) 'e') evaluates to 101 if I am not mistaken. (Try System.out.println((int) 'e'));
So in your case, you can switch over int values and detect for 1,2,3,4 and 101.
Your default should also throw an exception and you are fine.

Happy Coding

You could just use the char representations of the digits 1-4:

char choice = input.next().charAt(0);
switch (choice) 
case '1':
 aOT.areaOfTriangle();
 break;
case '2':
 hTDAH.hoursToDaysAndHours();
 break;
case '3':
 cTF.celciusToFahrenheit();
case '4':
 System.out.println("Code not implemented");
 break;
case 'e':
 repeat = false;
 break;
default:
 System.out.println("");
 break;