最后,我们将新List作为结果返回: AI检测代码解析 returndistinctList; 1. 完整示例 下面是一个完整的示例代码,包含了上述步骤的实现: AI检测代码解析 importjava.util.ArrayList;importjava.util.List;publicclassListUtils{publicstatic<T>List<T>distinctByField(List<T>originalList){List<T>distinctList=newArrayList...
如果当前元素的字段值在新的List中不存在,我们可以将其添加到新的List中: distinctList.add(item); 1. 步骤五:返回新的List 最后,我们需要将新的List作为结果返回: returndistinctList; 1. 至此,我们完成了Java List根据某一字段去重的实现。 下面是完整的示例代码: publicList<T>distinctListByField(List<T>or...
This function creates aListof field values and thisListact as a single key for thatStreamitem. Thelistcontains the values of fields to check distinct combinations. Then these keys are inserted into aConcurrentHashMapthat allows only unique keys. Predicate distinctByKeys() privatestatic<T>Predicate...
public static List<Object> getNoDuplicate4(List<String> datas) { List<Object> res = datas.stream().distinct().collect(Collectors.toList()); return res; } /** * 对象去重 * @param users * @return */ public static ArrayList<User> removeDuplicateUser(List<User> users) { Set<User> perso...
运行结果如下,达到预期,根据自己想要的字段进行list集合去重操作。 二、List<T> 自定义对象,根据某一列去重,利用lambad 来实现 @TestpublicvoiddistinctList() { AdviceInfo adviceInfo=newAdviceInfo(); adviceInfo.setHospId(8888L); adviceInfo.setSex("女"); ...
Find all distinct strings Collection<String>list=Arrays.asList("A","B","C","D","A","B","C");List<String>distinctChars=list.stream().distinct().collect(Collectors.toList());//[A, B, C, D] 3. Stream Distincts By Field or Property ...
Field Value Value = 2001 Int32 Attributes RegisterAttribute Remarks The constant in the Java programming language, sometimes referred to as a type code, that identifies the generic SQL typeDISTINCT. Added in 1.2. Java documentation forjava.sql.Types.DISTINCT. ...
, T> distinctBy(Function<? super T, ? extends A> classifier) { Supplier<Map<A, List<T>>> initializer = HashMap::new; Gatherer.Integrator<Map<A, List<T>>, T, T> integrator = (state, element, _) -> { state.computeIfAbsent(classifier.apply(element), _ -> new ArrayList<>())....
ArrayList<Item>items=newArrayList<>();Collections.addAll(list,1,2,3,4,5);items.removeIf(ele->ele.getId()==3); 【6】集合内元素的排序:若要为集合内的元素排序,就必须调用 sort 方法,传入比较器匿名内部类重写 compare 方法,我们现在可以使用 lambda 表达式来简化代码。
.toList(); // 输出去重后的结果 for (Record record : distinctRecordList) { System.out.println(record.getField()); } } // 定义一个Record类 static class Record { private String field; public Record(String field) { this.field = field; ...