java编程，求大神指教

import java.util.ArrayList;
import java.util.List;

public class Student {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
List ss = new ArrayList();
for(int i =1;i<6;i++){
Student s = new Student("学生"+i,"学号"+i,"班级"+i);
s.toString();
ss.add(s);
}
}

private String sid;
private String sName;
private String sClass;
public String getSid() {
return sid;
}
public void setSid(String sid) {
this.sid = sid;
}
public String getSName() {
return sName;
}
public void setSName(String name) {
sName = name;
}
public String getSClass() {
return sClass;
}
public void setSClass(String class1) {
sClass = class1;
}
public Student(String sid, String name, String class1) {
super();
this.sid = sid;
sName = name;
sClass = class1;
}
public Student(String sid, String name) {
super();
this.sid = sid;
sName = name;
}
public Student() {
super();
}
@Override
public String toString() {
// TODO Auto-generated method stub
System.out.println(sName+"("+sid+sClass+")");
return sName+"("+sid+sClass+")";
}

}