import java.util.List; public class UniqueValues { public static void main(String[] args) { List<Integer> list1 = new ArrayList<>(); List<Integer> list2 = new ArrayList<>(); List<Integer> uniqueList = new ArrayList<>(); // 向list1和list2添加元素 list1.add(1); list1.add(2...
Set集合可以保证其中的元素不重复。 Set<String>uniqueValues=newHashSet<>();for(Stringelement:list){uniqueValues.add(element.getField());} 1. 2. 3. 4. 步骤5:获取不重复的字段值 最后,在这一步中,我们可以通过打印Set集合来获取不重复的字段值。 System.out.println(uniqueValues); 1. 这样,你就可...
importjava.util.*;classA{privateString field1;privateString field2;// 其他字段...// 构造函数、getter和setter...}publicclassMain{publicstaticvoidmain(String[]args){List<A>dataList=...// 你的数据列表Map<String,A>map=newHashMap<>();for(Aobj:dataList){String key=obj.getField1()+","+...
List<Integer> list =newArrayList<>(map.values()); returnlist.toArray(newInteger[list.size()]); } // 7. 利用filter表达式,即把不符合条件的过滤掉。需要借助外部列表存储不重复项。 staticList<Integer> unique7newArr =newArrayList<>(); staticbooleanunique7contains(Integer item){ if(unique7newArr....
The UniqueValues object creates and maintains a list of unique values and the associated counts. UniqueValues is a helper object that provides pixel value information, the unique values and the associated counts, of a raster for RasterUniqueValueRenderer and RasterClassifyColorRampRenderer objects. ...
unique.stream().forEach(student->{ System.out.println(student.getName()); }); 4、取出list集合对象中某一个属性 取出每个对象中的姓名组成一个新的集合 List<String> listStr =list.stream().map(Student::getName).collect(Collectors.toList()); ...
Let’s test the code. We will add a few duplicate person records in theList. Then we will use theStream.distinct()method to find all instances ofPersonclass with uniqueid. Find distinct persons by id PersonlokeshOne=newPerson(1,"Lokesh","Gupta");PersonlokeshTwo=newPerson(1,"Lokesh","Gu...
public void listFriends(String personName) { try (Session session = driver.session()) { String query = "MATCH (p:Person {name: $name})-[:FRIEND]->(friend) RETURN friend.name"; session.run(query, Values.parameters("name", personName)).list(record -> record.get("friend.name").asStri...
For example, the class belowgenerates unique identifiers local to each thread. A thread's id is assignedthe first time it invokesThreadId.get() 如下例可知,ThreadLocal 实例是在线程要访问到的类中进行初始化的,且初始化时只要创建ThreadLocal类即可,覆盖inintialValues方法。那么线程在访问该类时即得到一...
UniqueConstraint.java Version.java package-info.java 生成文件总数 142 (57 个位于程序包的根目录中, 55 个位于“impl”子目录, 30 个位于 impl/runtime 子目录) 62 总大小(所有文件) 2.22 MB 279 KB 对于同一个 XML 模式,JAXB 2.0 RI 生成的类要少很多,总文件大小要比 JAXB 1.0 RI 生成的类小一个...