troubleshooting Question

Java Collections sort by name - syntax error

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unistudent asked on
4 Comments1 Solution298 ViewsLast Modified:
Hi experts,

I have a problem using List, Collections.sort() <== got a syntax error

I have a List of data like below:

         SchoolContactInfo schoolContactInfo [] = {
                  new ArtStudent("Paul", "987654561"),
                  new ArtStudent("Avie", "987654561"),
                  new MathsStudent("John","98769832")};

         List<SchoolContactInfo > mylist = new ArrayList<SchoolContactInfo >();
         mylist.add(schoolContactInfo [0]);
         mylist.add(schoolContactInfo [1]);
         mylist.add(schoolContactInfo [2]);


What I want the output sorted by name using Collections sort but i got sysntax saying

SchoolContactInfo is not valid substitute of bounded parameters

My other class like below:

public abstract class SchoolContactInfo {
      private String name;
      private String phone;

      // Constructor
      public ContactInfo(String Name, String Phone) {
            name = Name;
            phone = Phone;

      public String getName() {
            return name;

      public void setName(String name) {
   = name;

      public String getPhone() {
            return phone;

      public void setPhone(String phone) {
   = phone;

public class ArtStudent extends SchoolContactInfo {
      // constructor
      public FriendA(String name, String phone) {
            super(name, phone);

public class MathsStudent extends SchoolContactInfo {
      // constructor
      public FriendA(String name, String phone) {
            super(name, phone);

please correct my syntax. notes i want the output of student sorted by the name
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