Use computeIfAbsent in EventBus (#2138)

2023-02-19 13:25:20 +08:00
parent ed0a4c8cf4
commit 6f70da51f9
1 changed files with 1 additions and 2 deletions
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/event/EventBus.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/event/EventBus.java
@@ -31,8 +31,7 @@ public final class EventBus {

    @SuppressWarnings("unchecked")
    public <T extends Event> EventManager<T> channel(Class<T> clazz) {
-        events.putIfAbsent(clazz, new EventManager<>());
-        return (EventManager<T>) events.get(clazz);
+        return (EventManager<T>) events.computeIfAbsent(clazz, ignored -> new EventManager<>());
    }

    @SuppressWarnings("unchecked")