insert '}' to complete classbody有关问题

import java.util.ArrayList;import java.util.List;public class Client {    Person p1=new Person("CRoach",19,1);    Person p2=new Person("xiaoxian",20,2);    Person p3=new Person("jiawei",20,3);    Person p4=new Person("dameng",19,4);        Environment environment=new Environment();    SortByNamePositive sortByNamePositive=new SortByNamePositive();    List<Person> list=new ArrayList<Person>();    list.add(p1)；}