cunstructor

1. 
   

   //cunstructor

   
   

   class student{

   
   

       private int age;

       private String Name;

       student( int age ,String name){

           this.age=age;

           this.Name=name;

   
   

       }

       public int getAge(){

           return age;

       }

        public String getName(){

           return Name;

       }

   }

   
   

   public class cunstructor1 {

       public static void main(String[] args) {

           student obj = new student(18, "rakesh");

           int age=obj.getAge();

           System.out.println(age);

           String name= obj.getName();

           System.out.println(name);

   
   

          

       }

      

   }
2. 
   

   class student {

       private int age;

       private String Name;

       public student(){

           System.out.println("this constuctor parameter is zero");

   
   

       }

   
   

        public student (int age, String Name){

           this.age=age;

           this.Name=Name;

   
   

        }

        public void show(){

           System.out.println(age);

           System.out.println(Name);

        }

   }

   
   
   

   public class cunstructor2 {

       public static void main(String[] args) {

           student obj= new student( 18, "Rakesh");

           obj.show();

           //this custructor output will be null and 0 beacause in this cunstructor parameter is 0

           student obj1 = new student();

           obj1.show();

      

          

       }

      

   }
3. //cunstuctor overloading

   
   

   class student{

   
   

       int Age;

       String Name;

   
   

       public student(){

           System.out.println("this custuter is 0 parameterize");

           Age = 19;

           Name = "Rakesh";

       }

           public student(int Age){

           this.Age=Age;

           Name = "Amit";

       }

           public student(int Age, String Name){

          this.Age=Age;

          this.Name=Name;

       }

       void show(){

           System.out.println(Name + " " +Age );

       }

   
   
   

   }

   
   
   
   

   public class cunstructor3 {

       public static void main(String[] args) {

           student obj= new student();

           obj.show();

            student obj2 = new student(21);

           obj2.show();

            student obj1 = new student(20,"Rahul");

           obj1.show();

          

          

          

       }

      

   }
4. //cunstuctor overloading

   
   

   class student{

   
   

       int Age;

       String Name;

   
   

       public student(){

           System.out.println("this custuter is 0 parameterize");

           Age = 19;

           Name = "Rakesh";

       }

           public student(int Age){

                

           this.Age=Age;

           Name = "Amit";

       }

           public student(int Age, String Name){

          this.Age=Age;

          this.Name=Name;

       }

       void show(){

           System.out.println(Name + " " +Age );

       }

   
   
   

   }

   
   
   
   

   public class cunstructor4 {

       public static void main(String[] args) {

           student obj= new student();

           obj.show();

            student obj2 = new student(21);

           obj2.show();

            student obj1 = new student(20,"Rahul");

           obj1.show();

          

          

          

       }

      

   }