'Comparator' combinator can be used
Reports Comparator instances defined as lambda expressions that could be expressed using Comparator.comparing() calls. Chained comparisons which can be replaced by Comparator.thenComparing() expression are also reported.
Example:
myList.sort((person1, person2) -> person1.getName().compareTo(person2.getName()));
myList2.sort((person1, person2) -> {
int res = person1.first().compareTo(person2.first());
if(res == 0) res = person1.second().compareTo(person2.second());
if(res == 0) res = person1.third() - person2.third();
return res;
});
After the quick-fixes are applied:
myList.sort(Comparator.comparing(Person::getName));
myList2.sort(Comparator.comparing(Person::first)
.thenComparing(Person::second)
.thenComparingInt(Person::third));
Locating this inspection
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
ComparatorCombinators- Via Settings dialog
Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.
This inspection depends on the Java feature 'Lambda expressions' which is available since Java 8.
Availability
- By default bundled with
- Can be installed with plugin
Java, 241.18072
Last modified: 18 June 2024