Exercise-11 : write a Java Program to swap digits from a given integer number. Use Constructor with parameter. Use necessary method and instance, if required.

class Bx
{
double width;
double height;
double depth;
Bx(double w, double h, double d) {
width = w;
height = h;
depth = d;
}
double volume() {
return width * height * depth;
}
}
class BxDemo7 {
public static void main(String args[]) {
Bx mybox1 = new Bx(4, 7, 20);
Bx mybox2 = new Bx(8, 6, 30);
double ad;
ad = mybox1.volume();
System.out.println("Volume is " + ad);
ad = mybox2.volume();
System.out.println("Volume is " + ad);
}
}

Exercise-10 : write a Java Program to swap digits from a given integer number. Use Constructor with parameter. Use necessary method and instance, if required.

class Bx
{
double width;
double height;
double depth;
Bx(double w, double h, double d) {
width = w;
height = h;
depth = d;
}
double volume() {
return width * height * depth;
}
}
class BxDemo7 {
public static void main(String args[]) {
Bx mybox1 = new Bx(4, 7, 20);
Bx mybox2 = new Bx(8, 6, 30);
double ad;
ad = mybox1.volume();
System.out.println("Volume is " + ad);
ad = mybox2.volume();
System.out.println("Volume is " + ad);
}
}

Exercise-9 : Write a Java Program to Count the Number of Vowels in a given string. Use Constructor, Instances and Method, if necessary. Do not use any parameter with Constructor.

package inheritence;
class inher
{
int m, n;
void display1()
{
System.out.println("Value of m n =" +m +" " +n);
}
}

class hasmot extends inher
{
int p;
void display2()
{
System.out.println("Valu of p =" + p);
}
void sum()
{
System.out.println("Sum of m n p =" +(m+n+p));
}
}
public class Inheritence {



public static void main(String[] args)
{
inher input=new inher();
hasmot input1=new hasmot();
input.m=40;
input.n=60;
System.out.println();
input1.m=20;
input1.n=30;
input1.p=50;
System.out.println("Value of mnp");
input.display1();
input1.display2();
System.out.println();
System.out.println("The result is=");
input1.sum();

}

Exercise-8 : Write a Java program to calculate the SUM and COUNT of Primes from a given range of numbers. Formatting required for the Input and Output statements. Use Method with Parameter and return value to the Main function.

package exx4;
class Bx{
int width,height;
int muti()
{   
return width*height;
}

void getvalue( int w, int h)
{
width = w;
height =h;   
}
}
public class Exx4 {
    public static void main(String[] args) {
         Bx ob1 = new Bx();
         Bx ob2 = new Bx();
         double value;
         ob1.getvalue(10,5);
         ob2.getvalue(20,4);
         value =ob1.muti();
         System.out.println("Result is secound " +value);
        
         value =ob2.muti();
         System.out.println("Result is secound " +value);
    }
   
}

Exercise-7 : Write a Java program to reverse an Integer number. After print the output, make the sum of all digits. Use Method. Do not use parameter. Return value from Method to the Main function.

package ex4;
import java.util.Scanner;
class reverse {
int sum = 0;
int getvalue()
{
return sum;
}
}
public class Ex4 {
    public static void main(String[] args) {
       
        Scanner h = new Scanner(System.in);
        reverse nm = new reverse();
        int m,rv=0,nber,sum=0;
        System.out.println("Plz enter the int number");
       
        m = h.nextInt();
        nber = m;
       
        while (nber!=0) {           
        rv = rv*10;
        rv = rv+nber%10;
        nber = nber/10;
        sum+=rv;       
        }
        System.out.println("Reverses " +rv);
        double result = nm.getvalue();
        System.out.println("These Reversed number is " +sum);
    }  
}

Exercise-6 : Write a Java Program to Solve/Calculate of a Simple Interest by given condition. Use Method to solve this issue. Do not use parameter and return value from Method.

import java.util.Scanner;
class benifit{

    int hi ,to,yr,ir;
   
    void display()
    {
    System.out.println("These result :"+((to*yr*ir)/100));
    }
}

public class Ex2 {   
    public static void main(String[] args) {
        benifit hh = new benifit();
        Scanner input = new Scanner(System.in);
        System.out.println("Plz enter your required code");
        hh.to = input.nextInt();
        hh.yr = input.nextInt();
        hh.ir = input.nextInt();
        hh.display();
    }
   
}

Exercise-5 : Design and Write a simple java class program which can perform all basic operation of a Calculator. Define necessary instance variable but do not use method.

import java.util.Scanner;

public class Ex1 {
   
    public static void main(String[] args) {
      Scanner input = new Scanner(System.in);
       int a,b,sum;
      
       System.out.println("plz enter a digit ");
       
       a = input.nextInt();
       b = input.nextInt();     
      
      sum = a+b;
      System.out.println("addition result " +sum);
     
      sum = a-b;
      System.out.println("addition result " +sum);     
     
      sum = a*b;
      System.out.println("addition result " +sum);
     
      sum = a/b;
      System.out.println("addition result " +sum);
   
    }
   
}