Write a java program which receives 3 integers as input data. These integers wil

Question

Write a java program which receives 3 integers as input data. These integers will be as the length of 3 sides of a triangle. You program needs to check if the input data can make a triangle, and then prints out the result. If they cannot make a triangle, print out a message, otherwise print out the area of the triangle.

The output looks like the following:

Hints:

Show your program works on NetBeans.

run Enter first side length: 3 second side length Enter Enter third side length 5 The area of this triangle is: 6 BUILD SUCCESSFUL (total time: 10 seconds) run Enter first side length 1 Enter second side length 1 Enter third side length: 3 These sides cannot make a triangle! BUILD SUCCESSFUL (total time: 9 seconds) run: Enter first side length: 1 Enter second side length. 5 Enter third sido longth: 9 The area of this Lriangle is: 0 BUILD SUCCESSFUL (total time: 11 seconds)

Explanation / Answer

import java.util.Scanner;

/**
* @author Srinivas Palli
*
*/
public class TriangleArea {
   public static void main(String[] args) {
       Scanner input = new Scanner(System.in);
       System.out.print("Enter the first side length : ");
       int a = input.nextInt();
       System.out.print("Enter the second side length : ");
       int b = input.nextInt();
       System.out.print("Enter the third side length : ");
       int c = input.nextInt();

       if (isTriangleValid(a, b, c)) {
           System.out.println("The are of this triangle is: "
                   + getArea(a, b, c));
       } else {
           System.out.println("These sides cannot make a triangle");
       }

   }

   /**
   * Checks whether the 3 sides can form a triangle The sum of any two sides
   * must be greater than the other side
   *
   * @param a
   * @param b
   * @param c
   * @return
   */
   public static boolean isTriangleValid(int a, int b, int c) {
       if ((a + b) >= c && (a + c) >= b && (b + c) >= a) {
           return true;
       } else {
           return false;
       }
   }

   /**
   * method to calculate area
   *
   * @param a
   * @param b
   * @param c
   * @return
   */
   public static int getArea(int a, int b, int c) {
       int s = (a + b + c) / 2;
       int x = ((s) * (s - a) * (s - b) * (s - c));
       int area = (int) Math.sqrt(x);
       return area;
   }
}

OUTPUT:

Enter the first side length : 3
Enter the second side length : 4
Enter the third side length : 5
The are of this triangle is: 6

Enter the first side length : 1
Enter the second side length : 1
Enter the third side length : 3
These sides cannot make a triangle

Enter the first side length : 4
Enter the second side length : 5
Enter the third side length : 9
The are of this triangle is: 0

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.