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//: enumerated/SecurityCategory.java

// More succinct subcategorization of enums.

import net.mindview.util.*;

enum SecurityCategory {

STOCK(Security.Stock.class), BOND(Security.Bond.class);

Security[] values;

SecurityCategory(Class<? extends Security> kind) {

values = kind.getEnumConstants();

}

interface Security {

enum Stock implements Security { SHORT, LONG, MARGIN }

enum Bond implements Security { MUNICIPAL, JUNK }

}

public Security randomSelection() {

return Enums.random(values);

}

public static void main(String[] args) {

for(int i = 0; i < 10; i++) {

SecurityCategory category =

Enums.random(SecurityCategory.class);

System.out.println(category + ": " +

category.randomSelection());

}

}

} /* Output:

BOND: MUNICIPAL

BOND: MUNICIPAL

STOCK: MARGIN

STOCK: MARGIN

BOND: JUNK

STOCK: SHORT

STOCK: LONG

STOCK: LONG

BOND: MUNICIPAL

BOND: JUNK

*///:~