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Asked: 2026-05-27T03:45:37+00:00

What am I missing here? http://www.ibm.com/developerworks/java/library/j-pg10255/index.html In reference to Listing 1: Why is lamp1

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What am I missing here? http://www.ibm.com/developerworks/java/library/j-pg10255/index.html

In reference to Listing 1: Why is 

lamp1 <=> lamp2

equal to a positive number but

"black"<=>"blue"

is a negative number?

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1 Answer

  1. Editorial Team

    It’s a bad example. In the LavaLamp.compareTo method the comparison is being built with this on the right-hand side and the other object on left-hand side. The usual convention is the reverse.

    So when you do lamp1 <=> lamp2, you’re effectively doing lamp2.baseColor <=> lamp1.baseColor.

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