Using switch statement with a range of value in each case

Question

Below is the code I have where I tried to execute each case with more than one value and it didn’t work:

switch (num) {

    case 1 .. 5:

        System.out.println("testing case 1 to 5");

        break;

    case 6 .. 10:

        System.out.println("testing case 6 to 10");

        break;

}

I know this works fine in Objective C. Can anyone tell me how I can do it in Java or I’ve to use if-else statements?

Answer 1

Check out the below code snippet: 

public static boolean isBetween(int x, int lower, int upper) {

  return lower <= x && x <= upper;

}

if (isBetween(num, 1, 5)) {

  System.out.println("testing case 1 to 5");

} else if (isBetween(num, 6, 10)) {

  System.out.println("testing case 6 to 10");

}

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Answer 2

switch case statements can be used to execute a specific for a certain parameter or condition. The usage os switch case statement is demonstrated in the below code:

It is not possible in Java to provide a range in each case. But it can be achieved by using a set of if-else statements:

public class AgeCategory { public static void main(String[] args) { int age_1 = 25; String category = getCategory(age_1);   switch (category) { case "Child": System.out.println("You are a child."); break; case "Teen": System.out.println("You are a teenager."); break; case "Adult": System.out.println("You are an adult."); break; default: System.out.println("Invalid Age"); break; } }

 

public static String getCategory(int age_2) { if (age_2 >= 0 && age_2 <= 12) { return "Child"; } else if (age_2 >= 13 && age_2 <= 19) { return "Teen"; } else if (age_2 >= 20 && age_2 <= 64) { return "Adult"; } else if (age_2 >= 65) { return "Senior"; } else { return "Invalid"; } } }