Use List Sort
Properties
| Property | Value |
|---|---|
| First seen in jSparrow version | 3.6.0 |
| Minimum Java version | 8 |
| Remediation cost | 2 min |
Description
Replace static invocations of Collections.sort(List, Comparator) with List.sort(Comparator).
Benefits
Improves the readability by utilizing the Java 8 extensions of the List API.
Requirement & Tags
Requirements
Java 8
Code Changes
Static Sort Invocation
Pre
public void sortUsersById(List<User> users) {
Collections.sort(users, (User o1, User o2) -> o1.getId() - o2.getId());
}
Post
public void sortUsersById(List<User> users) {
users.sort((User o1, User o2) -> o1.getId() - o2.getId());
}
Inline Comparator Implementation
Pre
public void sortUsersById(List<User> users) {
Collections.sort(users, new Comparator<User>() {
@Override
public int compare(User o1, User o2) {
return o1.getId() - o2.getId();
}
});
}
Post
public void sortUsersById(List<User> users) {
users.sort(new Comparator<User>() {
@Override
public int compare(User o1, User o2) {
return o1.getId() - o2.getId();
}
});
}
Comparator Reference
Pre
public void sortUsersById(List<User> users) {
Comparator<User> comparator = (User o1, User o2) -> o1.getId() - o2.getId();
Collections.sort(users, comparator);
}
Post
public void sortUsersById(List<User> users) {
Comparator<User> comparator = (User o1, User o2) -> o1.getId() - o2.getId();
users.sort(comparator);
}
Automatic Application of This Rule
The automatic application of this rule is supported in the following jSparrow version: