在switch语句中以默认情况继续

Question

If I had this:

do {
    int x = scannerScan.nextInt();

    switch(x)
    {
        case 1:
            System.out.println("Stuff");
            break;
        case 2:
            System.out.println("Pink cows are fluffy and can fly.");
        default:
            continue;
    }
}
while(true);

What would happen if the default case were to be reached? I tried to find stuff on the internet and Stackoverflow, but could not find anything about a continue in the default case that had to do with the Java language.

Answer 1

continue statement in the loop

The continue statement skips the current iteration of a for , while , or do-while loop. The unlabeled form skips to the end of the innermost loop's body and evaluates the boolean expression that controls the loop. [...]

In your code the loop while(true); will continue. The statement makes no effect on the switch code block.

Answer 2

continue statements in switch statements are not special. It would jump to the loop condition (the end of the loop body), just as it would if it was inside the loop but outside the switch .

In this particular code snippet, it effectively does nothing.

Answer 3

Compare break statement :

A break statement attempts to transfer control to the innermost enclosing switch , while , do , or for statement …

With continue statement :

A continue statement attempts to transfer control to the innermost enclosing while , do , or for statement …

Thus, continue refers to the do...while loop, and:

… then immediately ends the current iteration and begins a new one.