insert '}' to complete classbody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)；}