i using abstract method ,

and always prompt out wiv " not abstract and does not override abstract method " tis kind of error

ublic abstract class Person
{
protected Name name;
protected String address;
protected String hp;
protected String eadd;
private static int counter;


Person(Name name,String address,String hp,String eadd){


this.name = new Name(name);
this.address = address;this.hp = hp;
this.eadd = eadd;
}


Person()
{
}


public void setName(Name n)
{
name = new Name(n);
}
public void setAddress(String address)
{
this.address = address;
}


public String getAddress()
{
return address;
}
public void setHp(String hp)
{this.hp = hp;
}


public String getHp()
{
return hp;
}


public void setEadd(String eadd)
{
this.eadd = eadd;
}


public String getEadd()
{
return eadd;
}


public String getName()
{
return name.getName();
}


public String getTitle()
{
return name.getTitle();
}


public static void setcounter()
{
counter++;
}


public static int getcounter()
{
return counter;
}
public static void setcounter2()
{
counter--;
}


public abstract void setOfficeRN(String officeRN);
public abstract void setDiv(String div);
public abstract void setSchoolID(String schoolID);
public abstract void setCourse(String course);
public abstract void setSchool(String school);
public abstract void setRegisterNo(int registerNo);
public abstract String getOfficeRN();
public abstract String getDiv();
public abstract String getSchoolID();
public abstract String getCourse();
public abstract String getSchool();
public abstract int getRegisterNo();
public abstract boolean equals(Person person);
public abstract void makeCopy(Person person);


public String toString()
{
return "Name " + getTitle() +"." + getName() +"\n Address " + getAddress() + "\n Handphone Number " + getHp() + "\n Email Address " + getEadd();
}
}


--------------------------------------------------------------------------
public class Members extends Students{
protected int registerNo;



Members(Name name,String address,String hp,String emailAddress,String schoolID,String course,String school,int registerNo){
super(name,address,hp,emailAddress,schoolID,course,school);
this.registerNo = registerNo;
}


public void setRegisterNo(int registerNo)
{
this.registerNo = registerNo;
}


public int getRegisterNo()
{
return registerNo;
}


public boolean equals(Person m)
{
boolean equal = false;
if(this.name.equals(m.name)){
if(this.eadd.equals(m.eadd)){
if(this.hp.equals(((Students)m).schoolID)){
equal = true;
}
}
}return equal;
}


public void makeCopy(Person m){this.name = m.name;
this.address = m.address;this.hp = m.hp;
this.eadd = m.eadd;
this.schoolID = ((Students)m).schoolID;
this.course = ((Students)m).course;
this.school = ((Students)m).school;
this.registerNo = ((Members)m).registerNo;
}
public String toString(){
return super.toString()+"\nRegister Number:"+registerNo;
}


}


------------------------------------------------------------------------
public class Name {


private String title;
private String name;


Name(String title , String name)
{
this.title = title;this.name = name;
}


Name(Name name)
{
this.title = name.title;this.name = name.name;
}


public void setName(String name)
{this.name = name;
}


public String getName()
{
return name;
}


public void setTitle(String title)
{
this.title = title;
}


public String getTitle()
{
return title;
}
}
------------------------------------------------------------------------
public class Lecturers extends Person{


private String div;
private String officeRN;


Lecturers(Name name, String address, String hp, String eadd, String div, String officeRN)
{
super(name,address,hp,eadd);
this.div = div;
this.officeRN = officeRN;
}


Lecturers()
{
}


public void setDiv(String div)
{
this.div = div;
}


public String getDiv()
{
return div;
}


public void setOfficeRN(String officeRN)
{
this.officeRN = officeRN;
}


public String getOfficeRN()
{
return officeRN;
}


public void makeCopy(Person l){this.name = l.name;
this.address = l.address;this.hp = l.hp;
this.eadd = l.eadd;
this.div = ((Lecturers)l).div;
this.officeRN = ((Lecturers)l).officeRN;
}


public boolean equals(Person l)
{
boolean equal = false;
if(this.name.equals(l.name)){
if(this.eadd.equals(l.eadd)){
if(this.hp.equals(((Lecturers)l).hp)){
equal = true;
}
}
}return equal;
}


public String toString(){
return super.toString()+"\nDivision:"+div+"\nOffice Room Number:"+officeRN;
}


}
----------------------------------------------------------------------
public class Students extends Person{


protected String schoolID;
protected String course;
protected String school;


Students(Name name, String address, String hp, String eadd, String schoolID, String course, String school)
{
super(name,address,hp,eadd);
this.schoolID = schoolID;
this.course = course;
this.school = school;
}


Students(){}


public void setSchoolID(String schoolID)
{
this.schoolID = schoolID;
}


public String getSchoolID()
{
return schoolID;
}


public void setCourse(String course)
{
this.course = course;
}


public String getCourse()
{
return course;
}


public void setSchool(String school)
{
this.school = school;
}


public String getSchool()
{
return school;
}


public void makeCopy(Person s)
{this.name = s.name;
this.address = s.address;this.hp = s.hp;
this.eadd = s.eadd;
this.schoolID = ((Students)s).schoolID;
this.course = ((Students)s).course;
this.school = ((Students)s).school;
}


public boolean equals(Person s)
{
boolean equal = false;
if(this.name.equals(s.name)){
if(this.eadd.equals(s.eadd)){
if(this.schoolID.equals(((Students)s).schoolID)){
equal = true;
}
}
}return equal;
}


public String toString()
{
return super.toString()+"\nId:"+schoolID+"\nCourse:"+course+"\nSchool:"+school;
}
}
------------------------------------------------------------------------
public class TaskOne {


public static void main(String args[]){



Name name1 = new Name("Mr","Kong Fook Shen");
Person person1 = new Students(name1,"D4-10,JLN Awana","0166809599","kfshen12@hotmail.com","07WAD03773","DIA2","SAS");
Name name2 = new Name("Dr","Inimitable");
Person person2 = new Lecturers(name2,"D3-10,JLN Awana","0166809959","Inimitable@yahii.com","Computer Science","A323");
Name name3 = new Name("Mrs","Kong");
Person person3 = new Members(name3,"D2-10,JLN Awana","0166809559","Kong12@hotmail.com","07WAD07733","DIA2","SOS",443211);
Person person4 = new Lecturers();


System.out.println(person1);
System.out.println(person2);
System.out.println(person3);
person4.makeCopy(person2);
System.out.println(person4);
System.out.println(person2.equals(person4));
System.out.println(person2.equals(person3));


Person person5 = new Students();



Name name4 = new Name("Sir","Shen");
person5.setName(name4);
person5.setAddress("D1-10,JLN Awana");
person5.setHp("0166809995");
person5.setEadd("Shen12@hotmail.com");
person5.setSchoolID("07WAD07337");
person5.setCourse("DIT2");
person5.setSchool("SAS");
System.out.println(person5.getName()+"\n"+person5.getAddress()+"\n"+person5.getHp()+"\n"+person5.getEadd()+"\n"+person5.getSchoolID()+"\n"+person5.getCourse()+"\n"+person5.getSchool());
}



}
p-----------------------------------------------------------------------

Whenever I run my task

C:\Students.java:10: Students is not abstract and does not override abstract method getRegisterNo() in Person
public class Students extends Person{
^
C:\Lecturers.java:10: Lecturers is not abstract and does not override abstract method getRegisterNo() in Person
public class Lecturers extends Person{
^
2 errors


Process completed.

HELP PLS!!

Edited 3 Years Ago by happygeek: fixed formatting

The Person class is abstract. So the classes that extend Person must implement all the abstract methods of Person.

The classes: Students and Lecturers must implement the method getRegisterNo() .
You have forgotten to implement this method when you did:

Students extends Person

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