WAP of Switch case in Java

/*WAP to capture the two integer values from user and perform following actions according to user Requierement
1. Addition
2. Substraction
3. Multiplication
4. Division
5. Exit
*/

import java.lang.*;
import java.io.*;
class oprations
{
 public void InputMsg()
 {System.out.println("Enter Two Integer numbers. ");}
 
 public void continueMsg()
 {System.out.println("Do you want to Continue. \n1. Yes \n0. No");}
 
 public static void main (String args[]) throws IOException
 {
  int a , b, choice = -1 ;
  
  do
  {
    System.out.println("Choose a Opration");
    System.out.println("1. Addition \n2. Substraction \n3. Multiplication \n4. Division \n5. Exit \nYour Choice: ");

    BufferedReader br = new BufferedReader(new 
         InputStreamReader(System.in));
    oprations e = new oprations();
    choice = Integer.parseInt(br.readLine());
    int repeate = -1;
    
   do
   {
    
    switch(choice)
    {
     
     case 1: e.InputMsg();
        a = Integer.parseInt(br.readLine());
        b = Integer.parseInt(br.readLine());
     System.out.println("Addition = "+(a+b));
    
     e.continueMsg();
     repeate = Integer.parseInt(br.readLine());
     break;
     case 2: e.InputMsg();
        a = Integer.parseInt(br.readLine());
        b = Integer.parseInt(br.readLine());
     System.out.println("Substraction = "+(a-b));
     
     e.continueMsg();
     repeate = Integer.parseInt(br.readLine());
     break;
     case 3: e.InputMsg();
        a = Integer.parseInt(br.readLine());
        b = Integer.parseInt(br.readLine());
     System.out.println("Multiplication = "+(a*b));
     
     e.continueMsg();
     repeate = Integer.parseInt(br.readLine());
     break;
     case 4: e.InputMsg();
        a = Integer.parseInt(br.readLine());
        b = Integer.parseInt(br.readLine());
     System.out.println("Division = "+(a/b));
     
     e.continueMsg();
     repeate = Integer.parseInt(br.readLine());
     break;
     case 5: System.out.println("BYE!"); 
     break;
     default: System.out.println("Invalid Input.");
    }
    
   }while(repeate != 0 && choice != 5);
   
  }while(choice != 5); 
 }
 
}

WAP to An improved version of the season program

/*WAP to An improved version of the season program*/

class Switch {
public static void main(String args[]) {
int month = 4;
String season;
switch (month) {
case 12:
case 1:
case 2:
season = "Winter";
break;
case 3:
case 4:
case 5:
season = "Spring";
break;
case 6:
case 7:
case 8:
season = "Summer";
break;
case 9:
case 10:
case 11:
season = "Autumn";
break;
default:
season = "Bogus Month";
}
System.out.println("April is in the " + season + ".");
}
}

WAP to check that In a switch, break statements are optional

/*WAP to check that In a switch, break statements are optional*/

class MissingBreak {
public static void main(String args[]) {
for(int i=0; i<12; i++)
switch(i) {
case 0:
case 1:
case 2:
case 3:
case 4:
System.out.println("i is less than 5");
break;
case 5:
case 6:
case 7:
case 8:
case 9:
System.out.println("i is less than 10");
break;
default:
System.out.println("i is 10 or more");
}
}
}

WAP to Demonstrate switch statements

/*WAP to Demonstrate switch statements*/

class SampleSwitch {
public static void main(String args[]) {
for(int i=0; i<6; i++)
switch(i) {
case 0:
System.out.println("i is zero.");
break;
case 1:
System.out.println("i is one.");
break;
case 2:
System.out.println("i is two.");
break;
case 3:
System.out.println("i is three.");
break;
default:
System.out.println("i is greater than 3.");
}
}
}