I have a List of fruit which contains name and ID
List<Fruit> fruitList = Arrays.asList(new Fruit("apple", 1), new Fruit("orange", 2), new Fruit("orange", 3));
I want to rename the fruit name with name_Id only if duplicate fruit name exists like in case of my list orange will rename to orange_2 and orange_3 but the apple will remain apple.. How can I do it in single stream expression.
The solution that I came up with is
Map<String, List<Fruit>> fruitMap = fruitList.stream().collect(Collectors.groupingBy(Fruit::getName));
Set<Entry<String, List<Fruit>>> entry = fruitMap.entrySet();
for (Entry<String, List<Fruit>> en : entry) {
List<Fruit> fruit = en.getValue();
if (fruit.size() > 1) {
fruit.stream().map(d -> {
d.setName(d.getName() + "_" + d.getId());
return d;
}).collect(Collectors.toList());
}
}
}
but this is way more than one stream expression.