Calculate Circle Area Using Java Example _ Java Examples - Java Program Sample Source Code
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9/26/2015 Calculate Circle Area using Java Example | Java Examples Java Program Sample Source Code data:text/html;charset=utf8,%3Col%20class%3D%22java%20geshifilterjava%22%20style%3D%22margin%3A%200px%3B%20padding%3A%200px%2… 1/1 1. * 2. Calculate Circle Area using Java Example 3. This Calculate Circle Area using Java Example shows how to calculate 4. area of circle using it's radius. 5. */ 6. 7. import java.io.BufferedReader; 8. import java.io.IOException; 9. import java.io.InputStreamReader; 10. 11. public class CalculateCircleAreaExample { 12. 13. public static void main(String[] args){ 14. 15. int radius = 0; 16. System.out.println("Please enter radius of a circle"); 17. 18. try 19. { 20. //get the radius from console 21. BufferedReader br = new BufferedReader(newInputStreamReader(System.in)); 22. radius = Integer.parseInt(br.readLine()); 23. } 24. //if invalid value was entered 25. catch(NumberFormatException ne) 26. { 27. System.out.println("Invalid radius value" + ne); 28. System.exit(0); 29. } 30. catch(IOException ioe) 31. { 32. System.out.println("IO Error :" + ioe); 33. System.exit(0); 34. } 35. 36. /* 37. * Area of a circle is 38. *pi*r*r 39. * where r is a radius of a circle. 40. */ 41. 42. //NOTE : use Math.PI constant to get value of pi 43. double area = Math.PI * radius * radius; 44. 45. System.out.println("Area of a circle is " + area); 46. } 47. } 48. 49. /* 50. Output of Calculate Circle Area using Java Example would be 51. Please enter radius of a circle 52. 19 53. Area of a circle is 1134.1149479459152 54. */
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Transcript of Calculate Circle Area Using Java Example _ Java Examples - Java Program Sample Source Code
9/26/2015 Calculate Circle Area using Java Example | Java Examples Java Program Sample Source Code
data:text/html;charset=utf8,%3Col%20class%3D%22java%20geshifilterjava%22%20style%3D%22margin%3A%200px%3B%20padding%3A%200px%2… 1/1
1. *2. Calculate Circle Area using Java Example3. This Calculate Circle Area using Java Example shows how to calculate4. area of circle using it's radius.5. */6. 7. import java.io.BufferedReader;8. import java.io.IOException;9. import java.io.InputStreamReader;10. 11. public class CalculateCircleAreaExample 12. 13. public static void main(String[] args) 14. 15. int radius = 0;16. System.out.println("Please enter radius of a circle");17. 18. try19. 20. //get the radius from console21. BufferedReader br = new BufferedReader(newInputStreamReader(System.in));22. radius = Integer.parseInt(br.readLine());23. 24. //if invalid value was entered25. catch(NumberFormatException ne)26. 27. System.out.println("Invalid radius value" + ne);28. System.exit(0);29. 30. catch(IOException ioe)31. 32. System.out.println("IO Error :" + ioe);33. System.exit(0);34. 35. 36. /*37. * Area of a circle is38. * pi * r * r39. * where r is a radius of a circle.40. */41. 42. //NOTE : use Math.PI constant to get value of pi43. double area = Math.PI * radius * radius;44. 45. System.out.println("Area of a circle is " + area);46. 47. 48. 49. /*50. Output of Calculate Circle Area using Java Example would be51. Please enter radius of a circle52. 1953. Area of a circle is 1134.114947945915254. */
