| import java.util.Map; | |
| import java.util.function.BinaryOperator; | |
| import java.util.function.Function; | |
| import java.util.stream.Collector; | |
| import java.util.stream.Stream; | |
| class Bug | |
| { | |
| void foo(Stream<Bug> words){ | |
| words.collect(toMap(w -> 1, (a, b) -> a + b)); | |
| } | |
| public static <T, K, U> | |
| Collector<T, ?, Map<K,U>> toMap(Function<Bug, U> valueMapper, | |
| BinaryOperator<U> mergeFunction) { | |
| return null; | |
| } | |
| } |