Why does IntelliJ IDEA show the warning "Inappropriate blocking method call" when one StringBuilder
appends another?
public Mono<String> doSomethingReactive() {
final StringBuilder sb1 = new StringBuilder("hello");
final StringBuilder sb2 = new StringBuilder("world");
sb1.append(sb2); // This append() causes warning "Inappropriate blocking method call"
sb1.append(sb2.toString()); // ... but this append() is OK :)
return Mono.just(sb1.toString());
}
I suspect it is a bug in IntelliJ IDEA, unless someone comes with a reasonable explanation. See https://youtrack.jetbrains.com/issue/IDEA-282947