// Demonstrating how JDK 1.4's $switch$ makes 
// some of the old notes invalid! (They used older JDK.)

interface Test {
    int X = 4;
}

class Blah implements Test { }

public class SwitchTest {
    public static void main(String[] args) {
	
	// X is public static final, so no problem here:
	System.out.println("Test 1: "+Blah.X);
	System.out.println("Test 2: "+Test.X);
	
	// No problem here, either:
	Blah b = new Blah();
	System.out.println("Test 3: "+b.X);

	// Case labels require constants and *constant expressions*
	// (no variables!), so the following won't work!
	int i = 4;
	switch(i) {
	case b.X: // need to fix with Test.X
	    System.out.println("It's a match!");
	    break;
	default:
	    System.out.println("It's crap!");
	}

	// Don't believe me? Try the following:
	int j = 5;
	int k = j;
	switch(j) {
	case k: // need to fix with 5!
	    System.out.println("It's a match!");
	    break;
	default:
	    System.out.println("It's crap!");
	}

    }
}