Java Constructor

Constructor:

Constructor is a special type of method that is used to initialize the object.

Properties of constructor:

• Has the same name that the class belong to.
• Has no return type.
• Called automatically.
• Default constructor (no parameter) , Parametrized constructor

Code:

1. public class EmployeeC {  
2.       
3.     int eid;  
4.     String ename;  
5.     String egender;  
6.     String edept;  
7.     //Parameterized Constructor implementation  
8.     public EmployeeC(int id,String name,String gender,String dept) {  
9.         eid=id;  
10.         ename=name;  
11.         egender=gender;  
12.         edept=dept;  
13.     }  
14.       
15.     public void showData() {  
16.         System.out.println("\nEmployee_id: "+eid+"\nEmployee_name: "+ename+"\nEmployee_gender: "+egender+"\nEmployee_department: "+edept);  
17.     }  
18.   
19. }  
20.   
21.   
22. // Main class  
23.   
24.   
25. public class ConstractorDemo {  
26.   
27.     public static void main(String[] args) {  
28.         // TODO Auto-generated method stub  
29.         EmployeeC emp1=new EmployeeC(101,"Sujan Hasan","Male","IT");  
30.         emp1.showData();  
31.           
32.         EmployeeC emp2=new EmployeeC(100,"Shimul Hossain","Male","Marketing");  
33.         emp2.showData();  
34.           
35.         EmployeeC emp3=new EmployeeC(102,"Shakil Sorker","Male","Networking");  
36.         emp3.showData();  
37.   
38.     }  
39.   
40. }