Chapter 14

1. Although libraries are great, they have downsides. Libraries tend to have more version compatibility problems than the features that are built into the language. Libraries are unable to provide a notation that is concise and readable as built-ins. Lastly, libraries do not lend themselves to interactions with novel control structures to support new application domains.
2. If your new computation only needs one or two parameters, appears many times in typical applications in your domain, and computes a new value without side effects, it is a good candidate to be made into an operator. An operator is limited to two operands, or at the most, three; otherwise, it will not provide any readability advantage over a function.
3. Ultimately, we have to read the books written by the Java language inventors to hear their reasons, but one answer might be that Java designers wanted to use strings as a class and decided classes would not be free to implement operators for the sake...