Examining the "Boolean-Switch" in Java \_(ツ)_/
While reading through some ai-generated code today, I was caught off guard when I saw a switch statement inside of a boolean. What on earth has ai done now, I wondered. Here is the suspect: public boolean canChangeTo ( OrderStatus newStatus ) { switch ( this ) { case PLACED: return newStatus == PROCESSING || newStatus == CANCELLED ; case PROCESSING: return newStatus == SHIPPED || newStatus ==…
While reading through some AI-generated code, the author came across a switch statement inside of a boolean function. Intrigued, they examined the code closely. The switch statement looked at the class type of the instance and returned true or false based on whether the new status matched certain conditions. The cases were for different statuses like PLACED, PROCESSING, SHIPPED, and CANCELLED. The default case returned false if none of the conditions were met.
The author questioned why this felt different from regular switch statements. They realized it was because enums, short for enumeration, were being used. Enums are a way to define a set of fixed choices that do not change. By using enums, the code avoids typos and makes the choices more explicit. Enums are classes in Java, adding another level of functionality.
The author then showed how to optimize the boolean-switch using Java 14's new arrow syntax. This made the code more concise and easier to read. They stated that using enums with the this keyword on the switch statement itself evaluates the enum value, not the boolean value. If a boolean value is being switched on, an if-else statement would be more appropriate.
The author concluded that enums make the code more powerful and efficient than using strings in if-else statements. They expressed that the switch statement is growing on them and seems like a better choice for this type of logic.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.