Setup IDE Write simple arithmetic expression, input/output. Using the Scanner cl

Question

Setup IDE Write simple arithmetic expression, input/output. Using the Scanner class to get input Be familiar with String class and some of its methods. Find the correct way of string comparisons. Be familiar with simple control statements (if else) Be familiar with some methods in Math Class Be able to generate random number by using Random class Know how to format the output by using DecimalFormat class Understanding order of operations Using the Scanner Class with input validation. Getting familiar with Control Statements (If else, Switch) Learn to use Scanner Class to get various inputs Learn to write simple arithmetic expression Learn to use escape sequence & DecimalFormat class output

Explanation / Answer

Note: based on the lab 3 and lab 4 requirements I developed some code.Please check it.If you need any modifications I will modify.Thank You.

___________________

Lab3.java

import java.text.DecimalFormat;
import java.util.Random;
import java.util.Scanner;

public class Lab3 {

   public static void main(String[] args) {
       //Declaring variables
       double random_number;
       int min,max;
      
       //Creating the Random Class object
       Random r = new Random();
      
       //Scanner class object is sued to read the inputs entered by the user
       Scanner sc=new Scanner(System.in);
      
       //Creating the DecimalFormat class object
       DecimalFormat df=new DecimalFormat("#.##");
      
       //Getting the inputs entered by the user
       System.out.print("Enter the Minimum Number :");
       min=sc.nextInt();
       while(true)
       {
       System.out.print(" Enter the Maximum Number :");
       max=sc.nextInt();
      
       if(max<min)
       {
           //Displaying the error message
           System.out.println("** Invalid Number.Max value must be greater than minimum value **");
           continue;
       }
       else
           break;
       }
      
       //Generating the double type random number
       random_number = min + (max - min) * r.nextDouble();
      
       //Displaying the random number
       System.out.print("The Random Number Generated is :"+random_number);
      
       //Using Math class floor() method
       System.out.println(" Using Math class floor() method "+Math.floor(random_number));

       //Using the format() method in DecimalFormat Class Object
       System.out.println("Displaying the number limiting to single decimal point :"+df.format(random_number));

   }

}

_________________

output:

Enter the Minimum Number :3

Enter the Maximum Number :2
** Invalid Number.Max value must be greater than minimum value **

Enter the Maximum Number :70
The Random Number Generated is :13.644608459095817
Using Math class floor() method 13.0
Displaying the number limiting to single decimal point :13.64

_____________________

Lab4.java

import java.util.Scanner;

public class Lab4 {

   public static void main(String[] args) {
      
       //Declaring the variables
       int result,number;
      
       //Scanner class object is sued to read the inputs entered by the user
               Scanner sc=new Scanner(System.in);

               //This while loop continues to execute until the user enteres a valid number
               while(true)
               {
                   //Getting the number entered by the user
               System.out.print("Enter a number between (1-4) :");
               number=sc.nextInt();
              
               //Checking whether the number is in range or not
               if(number<1 || number>4)
               {
                   //Displaying the error message
                   System.out.println("Invalid.number must be between 1-4 ");
                   continue;
               }
               else
               break;  
               }
              
               //Based on the user entered number the corresponding case will get executed
               switch(number)
               {
               case 1:{
                   int res=17 / 2 + 4 ;
                  
                   //Displaying the result
                   System.out.println("The result for 17 / 2 + 4 is "+res);
                   break;
               }
               case 2:{
                   int res=3 - (5 + 10 / (2 * 2));
                  
                   //Displaying the result
                   System.out.println("The result for 3 - (5 + 10 / (2 * 2)) is "+res);
                   break;
               }
               case 3:{
                   int res=15 / 2 % 3 - 1;
                  
                   //Displaying the result
                   System.out.println("The result for 15 / 2 % 3 - 1 is "+res);
                   break;
               }
               case 4:{
                   int res=7 * 2 - 5 / 3;
                  
                   //Displaying the result
                   System.out.println("The result for 7 * 2 - 5 / 3; is "+res);
                   break;
               }
               }
              
   }

}

_________________________

output:

Enter a number between (1-4) :1
The result for 17 / 2 + 4 is 12

______________Thank You

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