calculator JAVA

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DATE: Dec. 1, 2013, 12:31 p.m.

FORMAT: Java

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  1. Pertama, kita perlu ktahui ada pakage apa saja dlm sbuah aplikasi yg akan kita bangun, dan dalam aplikasi yg ini hanya ada 3 pakage, yaitu : pakege form, pakage entitas, pakage main..
  3. disetiap pakage akan berisi class'nya masing..
  4. pakage form = Berisi semua source form yg akan kita bangun termasuk even2'a..
  5. pakage entitas = Berisi semua source entitas utk menghubungkan antara entitas dgn form..
  6. pakage main = sbnarnya ini tidak begitu penting, hanya utk running program slm msih dalam tahap pembangunan..
  10. Tahap pertama Desain Form :
  11. [Image: 79302091.png]
  13. Langsung memberikan nama variable disetiap Swing..
  15. Tahap kedua setting running program melalui class main :
  16. Code:
  17. package calculatorujicoba;
  19. import Tampilan.TampilanUtama;
  21. /*
  22. * Programmer : Fajar Musti Prawira
  23. *
  24. * Created on 11 Nov 11, 21:28:41
  25. */
  27. public class CalculatorUjicoba {
  29. /**
  30. * @param args the command line arguments
  31. */
  32. public static void main(String[] args) {
  33. // TODO code application logic here
  34. TampilanUtama Tu = new TampilanUtama();
  35. Tu.setVisible(true);
  36. Tu.setLocationRelativeTo(null);
  37. }
  38. }
  40. Tahap ketiga Buat class entitas :
  41. PHP Code:
  42. package Entitas;
  44. /*
  45. * Programmer : Fajar Musti Prawira
  46. *
  47. * Created on 11 Nov 11, 21:28:41
  48. */
  50. public class EntitiCalcu {
  51. int operator = 0;
  52. double nilai1;
  53. double nilai2;
  54. double result;
  56. public void setNilai(String nl){
  57. if (!nl.equals("")){
  58. if(operator==0){
  59. nilai1= Double.valueOf(nl);
  60. }else{
  61. nilai2= Double.valueOf(nl);
  62. }
  63. }
  64. }
  66. public void setOperator(int operator) {
  67. this.operator = operator;
  68. }
  70. public double getResult() {
  71. return result;
  72. }
  74. public void setResult(double hasil) {
  75. this.result = hasil;
  76. }
  78. public void proses(){
  79. switch(operator){
  80. case 1:
  81. result = nilai1 + nilai2;
  82. break;
  83. case 2:
  84. result = nilai1 - nilai2;
  85. break;
  86. case 3:
  87. result = nilai1 * nilai2;
  88. break;
  89. case 4:
  90. result = nilai1 / nilai2;
  91. break;
  92. case 5:
  93. result = nilai1 % nilai2;
  94. break;
  95. case 6:
  96. result = 1/nilai1;
  97. break;
  98. }
  99. nilai1=result;
  100. }
  101. }
  103. Sebelum kita memberikan event di setiap swing, maka trlbh dahulu kita membuat methode..
  104. Code:
  105. //Menurunkan
  106. EntitiCalcu model = new EntitiCalcu();
  107. String oper="";
  109. //Ambil nilai
  110. public void getOper(javax.swing.JButton button){
  111. oper+=button.getText();
  112. model.setNilai(oper);
  113. resultHasil.setText(oper);
  114. }
  116. private void getOperator(int opt){
  117. model.setOperator(opt);
  118. oper="";
  119. }
  121. private void proses(){
  122. DecimalFormat df = new DecimalFormat("#,###.########");
  123. model.proses();
  124. oper="";
  125. resultHasil.setText(df.format(model.getResult())+"");
  126. }
  128. Lanjutkan Memberikan event di setiap butoon..
  129. sesuai namanya yaaa..
  130. Code:
  131. private void bnt_tambahActionPerformed(java.awt.event.ActionEvent evt) {
  132. // TODO add your handling code here:
  133. getOperator(1);
  134. }
  136. private void bnt_kurangActionPerformed(java.awt.event.ActionEvent evt) {
  137. // TODO add your handling code here:
  138. getOperator(2);
  139. }
  141. private void bnt_kaliActionPerformed(java.awt.event.ActionEvent evt) {
  142. // TODO add your handling code here:
  143. getOperator(3);
  144. }
  146. private void bnt_bagiActionPerformed(java.awt.event.ActionEvent evt) {
  147. // TODO add your handling code here:
  148. getOperator(4);
  149. }
  151. private void bnt_persenActionPerformed(java.awt.event.ActionEvent evt) {
  152. // TODO add your handling code here:
  153. getOperator(5);
  154. }
  156. private void bnt_samadengaActionPerformed(java.awt.event.ActionEvent evt) {
  157. // TODO add your handling code here:
  158. proses();
  159. }
  161. private void bnt_1ActionPerformed(java.awt.event.ActionEvent evt) {
  162. // TODO add your handling code here:
  163. getOper(bnt_1);
  164. }
  166. private void bnt_2ActionPerformed(java.awt.event.ActionEvent evt) {
  167. // TODO add your handling code here:
  168. getOper(bnt_2);
  169. }
  171. private void bnt_3ActionPerformed(java.awt.event.ActionEvent evt) {
  172. // TODO add your handling code here:
  173. getOper(bnt_3);
  174. }
  176. private void bnt_4ActionPerformed(java.awt.event.ActionEvent evt) {
  177. // TODO add your handling code here:
  178. getOper(bnt_4);
  179. }
  181. private void bnt_5ActionPerformed(java.awt.event.ActionEvent evt) {
  182. // TODO add your handling code here:
  183. getOper(bnt_5);
  184. }
  186. private void bnt_6ActionPerformed(java.awt.event.ActionEvent evt) {
  187. // TODO add your handling code here:
  188. getOper(bnt_6);
  189. }
  191. private void bnt_7ActionPerformed(java.awt.event.ActionEvent evt) {
  192. // TODO add your handling code here:
  193. getOper(bnt_7);
  194. }
  196. private void bnt_8ActionPerformed(java.awt.event.ActionEvent evt) {
  197. // TODO add your handling code here:
  198. getOper(bnt_8);
  199. }
  201. private void bnt_9ActionPerformed(java.awt.event.ActionEvent evt) {
  202. // TODO add your handling code here:
  203. getOper(bnt_9);
  204. }
  206. private void bnt_titikActionPerformed(java.awt.event.ActionEvent evt) {
  207. // TODO add your handling code here:
  208. getOper(bnt_titik);
  209. }
  211. private void bnt_0ActionPerformed(java.awt.event.ActionEvent evt) {
  212. // TODO add your handling code here:
  213. getOper(bnt_0);
  214. }
  216. private void bnt_cActionPerformed(java.awt.event.ActionEvent evt) {
  217. // TODO add your handling code here:
  218. if(oper.length()>1){
  219. oper = oper.substring(0, oper.length()-1);
  220. model.setNilai(oper);
  221. resultHasil.setText(oper);
  222. }else{
  223. oper = "";
  224. model.setNilai(oper);
  225. resultHasil.setText("0");
  226. }
  227. }
  229. private void bnt_ACActionPerformed(java.awt.event.ActionEvent evt) {
  230. // TODO add your handling code here:
  231. oper ="";
  232. model.setOperator(0);
  233. model.setResult(0);
  234. resultHasil.setText("0");
  235. }
  237. SELESAI, GOOD JOB Bahagia
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