Inheritance

  class demo
  {
    public static void main(String args[])
    {
        Person a=new Person("Amit Jain","Amravati");
        a.showData();
        Employee e;
        e=new Employee("Nitin Joshi","Nagpur","Clerk",257005000);
        e.showData();
        e.payment();
        Worker w;
        w=new Worker("Raja","Raipur",500,20);
        w.showData();
        w.payment();
    }
  }
  class Person
  {
    protected String name,city;
    public Person(String nm,String ct)
    {
        name=nm;
        city=ct;
    }
    public void showData()
    {
        System.out.println("Name is "+name);
        System.out.println("City is "+city);
    }
  } 
  class Employee extends Person
  {
    protected String job ;
    protected int salary , advance ;
    public Employee(String nm,String ct,String jb,int sl,int adv)
    {
        super(nm,ct);
        job=jb;
        salary=sl;
        advance=adv;
    }
    public void showData()
    {
        super.showData();
        System.out.println("Job is "+job);
        System.out.println("Salary is "+salary);
    }
    public void payment()
    {
        int p=salary–advance;
        System.out.println("Payment is "+p);
    }
  }
  class Worker extends Person
  {
    protected int wages,wdays;
    public Worker(String nm,String ct,int wg,int wd)
    {
        super(nm,ct);
        wages=wg;
        wdays=wd;
    }
    public void showData()
    {
        super.showData();
        System.out.println("Wages is "+wages);
        System.out.println("Wdays is "+wdays);
    }
    public void payment()
    {
        int p=wages*wdays;
        System.out.println("Payment is "+p);
    }
  }