Thread: Yes or No answers,

I am trying to add in a program where I would type "Yes or No" for the answer, but I can't get it to work, I know how to get number answers to work, with something like

		Scanner keyboard = new Scanner(System.in);
		System.out.println("Pick a number 1 - 10:");
		int WinnerPoints;
		WinnerPoints = 0;
		System.out.println("Your current amount of Points is " + WinnerPoints);
		int numberPicked = keyboard.nextInt();
		switch (numberPicked)
		{
		case 1:
		case 2:
		case 3:
		case 4:
		case 5:
		case 6:
		case 8:
		case 9:
		case 10:
			System.out.println("Sorry, you lost :(");
			System.out.println("Good Bye!");
			System.exit(0);
			break;
		case 7:
			System.out.println("YAY! You Won!");
			WinnerPoints = 0+5;
			System.out.println("Welcome to level 2!");
			break;

But when I try to make it to where I use Word answers instead and it won't work, This is the best I've gotten so far,

	Scanner keyboard = new Scanner(System.in);
		System.out.println("Hello and welcome to my JAVA program, Math Test!");
		System.out.println("This Test will be over: Addition");
		System.out.println("Are You Ready to go?");
		System.out.println("Yes or No?");
		String yes_or_no = keyboard.nextLine();
		switch (yes_or_no)
		{
		case Yes:
		}
 
 
	}
 
}

But my IDE says that

	Cannot switch on a value of type String. Only convertible int values or enum constants are permitted
	Yes cannot be resolved to a variable

What do I do to get words activate something?

What do I do to get words activate something?

You'll have to get java 1.7 for that style of switch statement. Until then only integers work.

A work around is a chain of if/else if/else if /else statements to compare the Strings.
Be sure to use the equals method.

I have the newest Java...

What error message do you get from the 1.7 javac compiler?

What is 'Yes' in your source? If you want to switch on 'yes_or_no' against String literals, you need to write

case "Yes":

At least, that's my guess - I'm not on Java 7 either.

Cannot switch on a value of type String

The IDEs message looks like it doesn't know about the new switch in java 1.7
@Sean4u - your syntax looks right.

Originally Posted by Sean4u

What is 'Yes' in your source? If you want to switch on 'yes_or_no' against String literals, you need to write

case "Yes":

At least, that's my guess - I'm not on Java 7 either.

Thanks that fixed that error, but I have this one still:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
	Cannot switch on a value of type String. Only convertible int values or enum constants are permitted
 
	at Addition.main(Addition.java:15)

Line 15 is:

switch (yes_or_no)

If you use Java 1.7 to compile(javac) it and execute(java) it, it should work.

Originally Posted by Norm

If you use Java 1.7 to compile(javac) it and execute(java) it, it should work.

I am using the IDE Eclipse, which compiles it for you, and runs it, It's always worked before.

Sorry, I know nothing about your IDE.
This code works for me with 1.7:

      String key = "ABC";
      switch (key) {
         case "ABC":
             System.out.println("works");    // works is printed
             break;
         default:
             System.out.println("not working");
      } // end switch