Creating a Deep Copy
public class MainClass {
public static void main(String[] args) {
Employee emp1 = new Employee("M", "A");
emp1.setSalary(40000.0);
emp1.address = new Address("First Street", "San F", "CA", "93702");
Employee emp2 = (Employee) emp1.clone();
printEmployee(emp1);
printEmployee(emp2);
emp2.setLastName("Smith");
emp2.address = new Address("Street", "B", "CA", "93722");
printEmployee(emp1);
printEmployee(emp2);
}
private static void printEmployee(Employee e) {
System.out.println(e.getFirstName() + " " + e.getLastName());
System.out.println(e.address.getAddress());
System.out.println("Salary: " + e.getSalary());
}
}
class Employee implements Cloneable {
private String lastName;
private String firstName;
private Double salary;
public Address address;
public Employee(String lastName, String firstName) {
this.lastName = lastName;
this.firstName = firstName;
this.address = new Address();
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFirstName() {
return this.firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public Double getSalary() {
return this.salary;
}
public void setSalary(Double salary) {
this.salary = salary;
}
public Object clone() {
Employee emp;
try {
emp = (Employee) super.clone();
emp.address = (Address) address.clone();
} catch (CloneNotSupportedException e) {
return null; // will never happen
}
return emp;
}
public String toString() {
return this.getClass().getName() + "[" + this.firstName + " " + this.lastName + ", "
+ this.salary + "]";
}
}
class Address implements Cloneable {
private String street;
private String city;
private String state;
private String zipCode;
public Address() {
this.street = "";
this.city = "";
this.state = "";
this.zipCode = "";
}
public Address(String street, String city, String state, String zipCode) {
this.street = street;
this.city = city;
this.state = state;
this.zipCode = zipCode;
}
public Object clone(){
try {
return super.clone();
} catch (CloneNotSupportedException e) {
return null; // will never happen
}
}
public String getAddress() {
return this.street + "\n" + this.city + ", " + this.state + " " + this.zipCode;
}
}
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