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Nov 13th, 2016
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  1. import java.util.Scanner;
  2. public class Lingkaran
  3. {
  4. public static void main(String[] args)
  5. {
  6. Scanner masukan = new Scanner(System.in);
  7. int pilihan=9;
  8. do
  9. {
  10. System.out.println("\nMENU\n");
  11. System.out.println("1. Keliling");
  12. System.out.println("2. Menghitung Luas Lingkaran");
  13. System.out.println("3. Keluar");
  14. System.out.print("Masukkan Pilihan Anda : ");
  15. pilihan = masukan.nextInt();
  16. switch(pilihan)
  17. {
  18. case 1 : Keliling(); break;
  19. case 2 : luasLingkaran(); break;
  20. }
  21. } while(pilihan != 3);
  22. }
  23.  
  24. private static void Keliling()
  25. {
  26. Scanner masukan = new Scanner(System.in);
  27. float jari2, luas;
  28. System.out.print("Masukkan nilai jari-jari : ");
  29. jari2 = masukan.nextFloat();
  30. luas = 3.14f * jari2 * 2;
  31. System.out.println("Keliling : " + luas);
  32. }
  33.  
  34. private static void luasLingkaran()
  35. {
  36. Scanner masukan = new Scanner(System.in);
  37. float jari2, luas;
  38. System.out.print("Masukkan nilai jari-jari : ");
  39. jari2 = masukan.nextFloat();
  40. luas = 3.14f * jari2 * jari2;
  41. System.out.println("Luas Lingkaran : " + luas);
  42. }
  43. }
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