View difference between Paste ID: kYiSfeFC and f7Y1A7j9

 package one;
 
 public class One
 {
     public static void main(String[] args)
     {
         Two tw = new Two();
         Two tw1 = new Two("alvi","01761900889",20.00,5000.00,1.00);
         Three th = new Three();
         Three th1 = new Three("alvi","01761900889",20.00,5000.00,1.00);
 
         /* set using setter and getter method */
         /*
         tw.setname("alvi");
         tw.setmobno("01761900889");
         tw.setage(20.00);
 
         tw.setbasic(5000); // FOR TWO CLASS
         th.setbasic(5000); // FOR THREE CLASS
 
         // IF WE DONT USE tw.setbasic(); and th.setbasic(); two times
         // THE VALUE OF BASIC WONT BE CHANGD SECOND TIME . THAT IS IT WILL
         // BE CHANGED TO 5000 FIRST TIME BUT IT WILL BE REMAIN IN INITIAL
         // VALUE 100 SECOND TIME
 
         tw.setyear(1.00);
         */
 
         /* we must use parameterized constructor , otherwise the basic wont
         be changed
         */
         System.out.println(tw1.salary());
         //System.out.println(th.salary());
         System.out.println(th1.salary());
         //System.out.println(tw.salary());
     }
 }
 
 
 
 public class Two
 {
     public String name = "A";
     public String mobno = "1761900889";
     public double age = 30.00;
     public double basic = 100.00 ;
     public double year = 1.00;
 
     Two()
     {
 
     }
     Two(String name,String mobno,double age,double basic,double year)
     {
         this.name=name;
         this.mobno=mobno;
         this.age=age;
         this.basic=basic;
         this.year=year;
     }
     public void setname(String name)
     {
         this.name=name;
     }
     public void setmobno(String mobno)
     {
         this.mobno=mobno;
     }
     public void setage(double age)
     {
         this.age=age;
     }
     public void setbasic(double basic)
     {
         this.basic=basic;
     }
     public void setyear(double year)
     {
         this.year=year;
     }
     public String getname()
     {
         return name;
     }
     public String getmobno()
     {
         return mobno;
     }
     public double getage()
     {
         return age;
     }
     public double getbasic()
     {
         return basic;
     }
     public double getyear()
     {
         return year;
     }
 
     public double salary()
     {
         double s = basic * 2 * year ;
         return s;
     }
 }
 
 
 
 
 public class Three extends Two
 {
     public double increament = ((basic*75)/100);
     Three()
     {
         super();
     }
     Three(String name,String mobno,double age,double basic,double year)
     {
         this.name=name;
         this.mobno=mobno;
         this.age=age;
         this.basic=basic;
         this.year=year;
     }
 
     public double salary()
     {
         double sa = ( (basic + increament)* 2 * year ) ;
         return sa;
     }
 }