Question

Must be java code

Project 2b: CalculatePerimeter You are to write code for the application CalculatePerimeter where the computer calculates and displays the perimeter of a triangle, provided the three double values entered from keyboard input represent a triangle. If they don't, the computer should display the fact that (at least, in the case of non-positive input) one of the values does not form a valid triangle What makes a valid triangle? All sides must be positive and the sum of any two sides must be greater than the value of the third side. When any side is non-positive, the machine should display a message conveying the fact that all sides must have a positive value. If one of the sides is too long, the machine should display the value of this side and an appropriate message. If all sides are OK, the computer displays the perimeter of the triangle, accurate to two decimal places. What follows are nine sample runs. You are to run your application using the sample values for all these runs because they exhaustively test your logic. A submission with just one or two sample runs will be considered inadequate in the extreme. Just use the values given in these runs, and your submission will be fine Enter the three sides of the triangle: -2.82 3.25_103 This does not form a proper triangle All lengths must have a positive value Enter the three sides of the triangle: 60 3 This does not form a proper triangle All lengths must have a positive value Enter the three sides of the triangle:_4.83.6-5.7 This does not form a proper triangle All lengths must have a positive value Enter the three sides of the triangle: 6.23.7_2.5 This does not form a proper triangle The side with length 6.20 is too large Enter the three sides of the triangle: 6.75 15.88 7.62 This does not form a proper triangle The side with length 15.88 is too large Enter the three sides of the triangle: 1.6 5.2 8.8 This does not form a proper triangle The side with length 8.80 is too large Enter the three sides of the triangle: 5 34 The triangle's perimeter is 12.00 Enter the three sides of the triangle: 6.12_9.225 8.7 The triangle's perimeter is 24.04 Enter the three sides of the triangle: 7.11 6.32 10.16 The triangle's perimeter is 23.59

Answer 1

Java Code :

import java.util.Scanner;       // for using Scanner class
public class CalculatePerimeter        // Creating CalculatePerimeter class
{
public static void main(String args[])
{
Scanner obj = new Scanner(System.in);       // Creating Scanner class object
      
System.out.print("\nEnter the three sides of the triangle: ");       // asking for three sides of a triangle
  
       // taking input of three sides of triangle of double type
double a = obj.nextDouble();      
double b = obj.nextDouble();
double c = obj.nextDouble();
  
       // checking valid triangle condition
if(a>0 && b>0 && c>0)
{
           // Note : whatever value we'll print here , we are printing with 2 decimal precision as in the given sample output
  
           if(a+b>c && b+c>a && c+a>b)           // valid triangle condition
{
System.out.printf("The triangle's perimeter is %.2f",(a+b+c));           // printing parameter of the triangle
               System.out.println();
}
else           // if trianglesides are not valid
{
System.out.println("This does not form a proper trianlge.");
  
               // printing too larger side with 2 decimal precision
if (a >= b && a >= c)  
System.out.printf("The side with length %.2f ", a);
else if (b >= a && b >= c)
System.out.printf("The side with length %.2f ", b);
else
System.out.printf("The side with length %.2f ", c);
  
System.out.println("is too large.");
}
  
}
else           // for invalid triangle sides
{
System.out.println("This does not form a proper trianlge.");
System.out.println("All lengths must have a positive value.");
}
}
}

Output :

:〈Users\U 1 SHAL\Desktop〉Javac CalculatePerine ter-Java :\Users\U 1 SHAL\Desktop〉Java CalculatePerine ter nter the three sides of the triangle-2.82 3.25 1.03 This does not form a proper trianlge II Lengths must have a pos1t1ue value :〈Users\U 1 SHAL\Desktop〉Java CalculatePe rimeter nter the three sides of the triangle: 6 0 3 This does not form a proper trianlge II Lengths must have a pos1t1ue value :〈Users\U 1 SHAL\Desktop〉Java CalculatePe rimeter nter the three sides of the triangle: 4.8 3.6 -5.7 This does not form a proper trianlge II Lengths must have a pos1t1ue value :\Users\U 1 SHAL\Desktop〉Java CalculatePerine ter nter the three sides of the triangle: 6.2 3.7 2.5 This does not form a proper trianlge The side with length 6.20 is too large :\Users\U 1 SHAL\Desktop〉Java CalculatePerine ter nter the three sides of the triangle: 6.75 15.88 7.62 This does not form a proper trianlge The side with length 15.88 is too large :\Users\U 1 SHAL\Desktop〉Java CalculatePerine ter nter the three sides of the triangle: 1.6 5.2 8.8 This does not form a proper trianlge The side with length 8.80 is too large :〈Users\U 1 SHAL\Desktop〉Java CalculatePe rimeter nter the three sides of the triangle 5 3 4 :\Users\U 1 SHAL\Desktop〉Java CalculatePerine ter nter the three sides of the triangle: 6.12 9.225 8.7 :\Users\U 1 SHAL\Desktop〉Java CalculatePerine ter nter the three sides of the triangle: 7.11 6.32 10.16 :\Users\UI SHAL\Desktop〉 The triangle's perimeter is 12.00 The triangle's perimeter is 24.04 The triangle's perimeter is 23.59