This is an example of how to create a clone class of a class. We have created Employee class to get its clone class, as shown below:
- The class
Employeehas two String fields and a Double field and getters and setters for the fields. - It overrides the
clone()method of Object, where it creates a newEmployeeobject and sets to its fields the values of the fields of the object. - It also overrides the
toString()method of Object, where it returns the name of the class the instance belongs to and its fields values. - We create a new
Employeeobject and get its clone object. Then we change a field’s value in the original object. This change does not pass to the clone object.
Let’s take a look at the code snippet that follows:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | package com.javacodegeeks.snippets.core;public class CloneClass { public static void main(String[] args) { Employee e1 = new Employee("Mark", "Adams"); e1.setValue(40000.0); Employee e2 = (Employee) e1.clone(); e1.setLName("Smith"); System.out.println(e1); System.out.println(e2); }}class Employee { private String lname; private String fname; private Double value; public Employee(String lastName, String firstName) { this.lname = lastName; this.fname = firstName; } public String getLName() { return this.lname; } public void setLName(String lastName) { this.lname = lastName; } public String getFName() { return this.fname; } public void setFName(String firstName) { this.fname = firstName; } public Double getVlaue() { return this.value; } public void setValue(Double salary) { this.value = salary; } @Override public Object clone() { Employee emp; emp = new Employee(this.lname, this.fname); emp.setValue(this.value); return emp; } @Override public String toString() { return this.getClass().getName() + "[" + this.fname + " " + this.lname + ", " + this.value + "]"; }} |
Output:
methodoverloading.Employee[Adams Smith, 40000.0]
methodoverloading.Employee[Adams Mark, 40000.0]
This was an example of how to create a clone class of a class in Java.
