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update labmda function

This commit is contained in:
joe zhang 2020-07-07 13:20:06 +08:00
parent 672ffdbe9f
commit 4f987c9198
1 changed files with 7 additions and 21 deletions
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28
java-collections-conversions-2/src/test/java/com/baeldung/convertlisttomap/ListToMapUnitTest.java
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@ -24,13 +24,9 @@ public class ListToMapUnitTest {
Map<Integer, List<String>> convertedMap = new HashMap<>();
Supplier<List<String>> listSupplier = () -> {
return new ArrayList<>();
};
Supplier<List<String>> listSupplier = ArrayList::new;
Supplier<Map<Integer, List<String>>> mapFactory = () -> {
return new HashMap<>();
};
Supplier<Map<Integer, List<String>>> mapFactory = HashMap::new;
convertedMap = strings.stream()
.collect(Collectors.groupingBy(String::length, mapFactory, Collectors.toCollection(listSupplier)));
@ -45,13 +41,9 @@ public class ListToMapUnitTest {
Map<Integer, List<String>> convertedMap = new HashMap<>();
Supplier<Map<Integer, List<String>>> mapFactory = () -> {
return new HashMap<>();
};
Supplier<Map<Integer, List<String>>> mapFactory = HashMap::new;
Supplier<List<String>> listSupplier = () -> {
return new ArrayList<>();
};
Supplier<List<String>> listSupplier = ArrayList::new;
BiConsumer<Map<Integer, List<String>>, String> accumulator = (response, element) -> {
Integer key = element.length();
@ -78,17 +70,11 @@ public class ListToMapUnitTest {
Map<Integer, List<String>> convertedMap = new HashMap<>();
Supplier<Map<Integer, List<String>>> mapFactory = () -> {
return new HashMap<>();
};
Supplier<Map<Integer, List<String>>> mapFactory = HashMap::new;
Supplier<List<String>> listSupplier = () -> {
return new ArrayList<>();
};
Supplier<List<String>> listSupplier = ArrayList::new;
Function<String, Integer> keyMapper = (element) -> {
return element.length();
};
Function<String, Integer> keyMapper = String::length;
Function<String, List<String>> valueMapper = (element) -> {
List<String> collection = listSupplier.get();