Write a program to show the constructor overloading at the version of constructor in available in a class.

class OverLoad

  {

    int age, num1,num2,num3,sum,e,b,c;

    String name;

    OverLoad(String n,int a)

    {

      name=n;

      age=a;

    }

    void disp()

     {

      System.out.println("Name of the person  :"+name);

      System.out.println("age  of the person  :"+age);

     }

   

    OverLoad(int e,int b,int c)

    {

     num1=e;

     num2=b;

     num3=c;

    

    }

   

     void show()

     {

       int sum=num1+num2+num3;

       System.out.println("sum  =:"+sum);

     }

  public static void main(String args[])

    {

       OverLoad ob=new OverLoad("kapil" ,19);

      

       ob.disp();

       OverLoad ab=new OverLoad(4,5,6);

       ab.show();

    }

 }

     

     

Create a class SimpleCalculator that has functionality of addition, substraction division, multiplication, square and squareroot.

class Calculator

  {

   public void calc()

    {

    int add, sub, mul, a, b, n,sqr,m;

    double div;

    a=Integer.parseInt(System.console().readLine("enter the first no.  :"));

    b=Integer.parseInt(System.console().readLine("enter the second no. :"));

    add=a+b;

    System.out.println("addition of two no.      ="+add);

    sub=a-b;

    System.out.println("substraction of two no.  ="+sub);

    mul=a*b;

    System.out.println("multiplecation of two no.="+mul);

    div=(double)a/b;

    System.out.println("division of two no.      ="+div);

    n=Integer.parseInt(System.console().readLine("enter the no. jiska square niklna hai  :"));

    sqr=n*n;

    System.out.println("square of the no="+sqr);

    m=Integer.parseInt(System.console().readLine("enter the no. jiska square niklna hai  :"));

    double sqtroot=Math.sqrt(m);

    System.out.println("squareroot of the no="+sqtroot);

   }

 

public static void main(String args[])

    {

      Calculator s=new Calculator();

      s.calc();

    

      

    }

 }

 

Create a java program that has three version of add method which can add two, three, and four integers

class VersionAddition

    {

      void firstVersion()

        {

          System.out.println("Enter the two no.s->");

          int a=Integer.parseInt(System.console().readLine("enter the valye fo first no. ="));

          int b=Integer.parseInt(System.console().readLine("enter the valye fo second no.="));

          int sum=a+b;

          System.out.println("sum of two integer ="+sum);

        }

       void secondVersion()

        {

          System.out.println(" ");

          System.out.println("Enter the three no.s->");

          int c=Integer.parseInt(System.console().readLine("enter the valye fo first no. ="));

          int d=Integer.parseInt(System.console().readLine("enter the valye fo second no.="));

          int e=Integer.parseInt(System.console().readLine("enter the valye fo third  no.="));

          int sum=c+d+e;

          System.out.println("sum of three integer ="+sum);

        }

       void thirdVersion()

        {

          System.out.println(" ");

          System.out.println("Enter the four no.s->");

          int f=Integer.parseInt(System.console().readLine("enter the valye fo first no. ="));

          int g=Integer.parseInt(System.console().readLine("enter the valye fo second no.="));

          int h=Integer.parseInt(System.console().readLine("enter the valye fo third  no.="));

          int i=Integer.parseInt(System.console().readLine("enter the valye fo forth  no.="));

          int sum=f+g+h+i;

          System.out.println("sum of four integer ="+sum);

        }

   public static void main(String args[])

      {

        VersionAddition v=new VersionAddition();

        v.firstVersion();

        v.secondVersion();

        v.thirdVersion();

      }

  }

create a package packCal in which main class Calculater and you create 4 different class,add,Multi, sub,Div in packAdd,packMulti,packSub,packDiv.These classes can be accessed through Calculator

This program is completed in 5 steps. These steps are :-

STEP 1 :- 

      ------Make Add package and run it------

package packadd;
public class add
{
public void add1(int a,int b)
{
int c=a+b;
System.out.println("the sum is="+c);
}
}

STEP 2 :- 

      ------Make Subtraction package and run it------

package packsub;
public class sub
{
public void sub1(int a,int b)
{
int c=a-b;
System.out.println("the subtraction is="+c);
}
}

STEP 3 :- 

      ------Make Multiplication package and run it------

package packmul;
public class mul
{
public void mul1(int a,int b)
{
int c=a*b;
System.out.println("the multiplication is="+c);
}
}

STEP 4 :- 

      ------Make Division package and run it------

package packdiv;
public class div
{
public void div1(int a,int b)
{
int c=a/b;
System.out.println("the division is="+c);
}
}

STEP 5 :- 

      ------Finally make a  package Calculator and import all  packages and store all packages in same directory and run it------

package packcal;
import packadd.add;
import packsub.sub;
import packmul.mul;
import packdiv.div;
public class calculator
{
public static void main(String...ghj)
{
add a= new add();
a.add1(5,4);
sub b= new sub();
b.sub1(5,4);
mul m=new mul();
m.mul1(4,5);
div d= new div();
d.div1(5,4);
}
}

Write a program to show the Multi level inheritance.

class A

 {

   void disp()

    { 

      System.out.println("Hello m Dikaoo kya");

    }

 }

class B extends A

 {

    void moll()

    {

      System.out.println("nye nye item chiye kya");

    }

  }

class MultiInheri extends B

  {

    void china()

    {

      System.out.println("sara ka sara mall kharab hai");

    }

  public static void main(String args[])

    {

     MultiInheri ab=new MultiInheri();

     ab.disp();

     ab.moll();

     ab.china();

    }

  }