Java – example of specifying multiple constraints in Generic

public interface Operation {
}

public class enum TestEnum implements Operation {
}

public class Test {
    private static <T extends Enum<T> & Operation> void test(Class<T> opSet, double x, double y) {
        for (Operation op : opSet.getEnumConstants())
            System.out.printf("%f %s %f = %f%n",    x, op, y, op.apply(x, y));
    }
}
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