MWE :
import java.util.Comparator; import java.util.TreeMap; import static java.util.Arrays.asList; import static java.util.stream.Collectors.groupingBy; import static java.util.stream.Collectors.mapping; import static java.util.stream.Collectors.toList; public class ShouldCompileInEclipse { void doesNotCompileInEclipse() { asList("eclipse").stream() .collect(groupingBy( this::function, () -> new TreeMap<>(Comparator.reverseOrder()), mapping(this::function, toList()))); } String function(String s) { return s; } }
Why won't the code compile under Eclipse?
Version: Neon.1a Release (4.6.1) Build id: 20161007-1200
Error:
Cannot infer type arguments for TreeMap<>
It compiles successfully javac 1.8.0_102
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