Pemi Ng Pemi Ng - 1 year ago 90
Java Question

Create an instance of Java subclass

I would like to create an instance of the Employee class.

public class Person {
private String name;
private String address;

public Person(){


public Person(String name, String address){ = name;
this.address = address;


public String getName(){
return name;

public void setName(String name){ = name;

public String getAddress(){
return address;

public void setAddress(String address){
this.address = address;

public String toString(){
return getClass().getName() + "\n" + name;

This is the subclass Employee:

public class Employee extends Person{
private String office;

public Employee(){


public Employee(String office){ = office;


public String getOffice(){
return office;

public void setOffice(String office){ = office;

However, when I write this in the main method:

Person person1 = new Employee("ABC", "", "NY")

Eclipse said this is not valid. But when I write

Person person 1 = new Employee("NY")

It is. I know that Employee takes one more constructor from the superclass Person. But how can I create an instance of Employee with details of Person class. Thanks a lot!

Answer Source

You have defined two constructors for the Employee class:

public Employee()


public Employee(String office)

Neither of these takes three arguments. So when you call:

new Employee("ABC", "", "NY")

the compiler cannot find a matching constructor - hence your error.

You probably want a constructor something like this:

Employee(String name, String address, String email, String office) {
    super(name, address, email); = office;

which can be called thus:

new Employee("Joe", "ABC", "", "NY");
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