Provide enumeration type MyEnum with some values ONE, TWO, THREE.
Provide a method in different class with switch statement with argument of this enumeration:

...
	switch (myEnumVar) {
		case ONE:
			break;
		case TWO:
			break;
		case THREE:
			break;
	}
...

Java requires to specify not qualified name: "ONE" is enough.
In debugger step through this method. When execution is within switch, debugger generates auto variables "ONE", "TWO", "THREE", but immediately shows error message "Cannot find local variable" against them.

Issue was closed