Intorduction To Parameterized Constructors ,toString() ,printing objects

public class Person

{

 private  String name,yearOfBirth;

 Person(String name1,String yob)

  {

    name=name1; 

    yearOfBirth=yob;

 

  }

 

 

 

  public String toString()

  {

      return(name+" "+yearOfBirth);

  }

 

}

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public class Student extends Person
{
    private String major;
    
    Student (String major1,String name,String yob)
     {
         super(name,yob);
         major=major1;
     }
    
      public String toString()
  {
      return(super.toString() + " "+major);
  }
 
 }

public class Instructor extends Person
{
 private String salary;

 Instructor(String salary1,String name,String yob)
  {
   super(name,yob);
   salary=salary1;
 
  }
 
   public String toString()
  {
      return(super.toString() + " "+ salary);
  }
 
}

public class Test
{
    public static void main(String args[])
    {
        Person personobj=new Person("John" ,"1957");
        Instructor instructorobj= new Instructor("50000","Satendra Narayan","1955");
        Student studentobj=new Student("engineering" ,"Manvir Basra","1991");
       
       
        System.out.println("\nOutput\n.........\nPrinting Person\n"+personobj);
        System.out.println("\nPrinting Student\n"+studentobj);
        System.out.println("\nPrinting Instructor\n"+instructorobj);
    }
}

 eJavaNotes

 by Basra , M.Singh