Question

Why is it that the following code:

class swi  
{
    public static void main(String[] args)  
    {  
        int a=98;
        switch(a)
        {
            default:{ System.out.println("default");continue;}
            case 'b':{ System.out.println(a); continue;}
            case 'a':{ System.out.println(a);}
        }
        System.out.println("Switch Completed");
    }
}

Gives the error:

continue outside of loop

Answer 1

Falling through is the standard behavior for a switch statement and so, consequently, using continue in a switch statement does not make sense. The continue statement is only used in for/while/do..while loops.

Based on my understanding of your intentions, you probably want to write:

System.out.println("default");
if ( (a == 'a') || (a == 'b') ){
    System.out.println(a);
}

I would also suggest that you place the default condition at the very end.

EDIT:
It is not entirely true that continue statements cannot be used inside switch statements. A (ideally labeled) continue statement is entirely valid. For example:

public class Main {
public static void main(String[] args) {
    loop:
    for (int i=0; i<10; i++) {
        switch (i) {
        case 1:
        case 3:
        case 5:
        case 7:
        case 9:
            continue loop;
        }

        System.out.println(i);
    }
}
}

This will produce the following output:
0
2
4
6
8