1. package com.rgy.entity;
  3. import java.awt.BorderLayout;
  4. import java.awt.Font;
  5. import java.awt.GridLayout;
  6. import java.awt.event.ActionEvent;
  7. import java.awt.event.ActionListener;
  9. import javax.swing.BorderFactory;
  10. import javax.swing.JButton;
  11. import javax.swing.JFrame;
  12. import javax.swing.JPanel;
  13. import javax.swing.JTextField;
  14. import javax.swing.WindowConstants;
  16. @SuppressWarnings("serial")
  17. public class Calculator2 extends JFrame{
  18. 	// 声明辅助变量
  19. 	private String str = "0";// 保存显示框中的字符串
  20. 	private String show_str="";// 保存副显示框中的字符串
  21. 	private double num_record = 0;// 记录当前数据的值
  22. 	private int operator = 0;// 记录当前运算符类型
  23. 	private int count_point=0;// 记录小数点个数，避免反复输入小数点
  24. 	// 声明并初始化各个组件
  25. 	private JTextField text_show = new JTextField("0");
  26. 	private JTextField text_show1 = new JTextField();
  27. 	private JPanel panel_up = new JPanel();
  28. 	private JPanel panel_CEandC = new JPanel();
  29. 	private JPanel panel_keys = new JPanel();
  30. 	private JButton button_CE = new JButton("CE");
  31. 	private JButton button_C = new JButton("C");
  32. 	private JButton button_num0 = new JButton("0");
  33. 	private JButton button_num1 = new JButton("1");
  34. 	private JButton button_num2 = new JButton("2");
  35. 	private JButton button_num3 = new JButton("3");
  36. 	private JButton button_num4 = new JButton("4");
  37. 	private JButton button_num5 = new JButton("5");
  38. 	private JButton button_num6 = new JButton("6");
  39. 	private JButton button_num7 = new JButton("7");
  40. 	private JButton button_num8 = new JButton("8");
  41. 	private JButton button_num9 = new JButton("9");
  42. 	private JButton button_division = new JButton("/");
  43. 	private JButton button_multiplication = new JButton("*");
  44. 	private JButton button_cut = new JButton("-");
  45. 	private JButton button_add = new JButton("+");
  46. 	private JButton button_equal = new JButton("=");
  47. 	private JButton button_point = new JButton(".");
  49. 	public Calculator2(String s) {
  50. 		super(s);
  51. 		this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
  52. 		this.setBounds(500,250,270,400);
  53. 		this.setVisible(true);
  54. 		//设置显示框
  55. 		text_show.setHorizontalAlignment(JTextField.RIGHT);
  56. 		text_show.setFont(new Font("Default", 0, 30));
  57. 		text_show.setEditable(false);// 不可编辑
  58. 		text_show1.setHorizontalAlignment(JTextField.RIGHT);
  59. 		text_show1.setFont(new Font("Default", 0, 16));
  60. 		text_show1.setEditable(false);
  61. 		// 设置布局及边框
  62. 		panel_up.setLayout(new BorderLayout());
  63. 		button_CE.setBorder(BorderFactory.createRaisedBevelBorder());
  64. 		button_C.setBorder(BorderFactory.createRaisedBevelBorder());
  65. 		button_CE.setFont(new Font("Default", 1, 20));
  66. 		button_C.setFont(new Font("Default", 1, 20));
  67. 		panel_up.setBorder(BorderFactory.createEtchedBorder ());
  68. 		panel_CEandC.setLayout(new GridLayout(1, 2, 7, 7));
  69. 		panel_keys.setLayout(new GridLayout(4, 4, 7, 7));
  70. 		// 面板的嵌套
  71. 		panel_up.add(text_show1, BorderLayout.NORTH);
  72. 		panel_up.add(text_show, BorderLayout.CENTER);
  73. 		panel_up.add(panel_CEandC, BorderLayout.SOUTH);
  74. 		this.add(panel_up, BorderLayout.NORTH);
  75. 		this.add(panel_keys, BorderLayout.CENTER);
  76. 		//在面板上加入按钮
  77. 		panel_CEandC.add(button_CE);panel_CEandC.add(button_C);
  78. 		panel_keys.add(button_num7);panel_keys.add(button_num8);
  79. 		panel_keys.add(button_num9);panel_keys.add(button_division);
  80. 		panel_keys.add(button_num4);panel_keys.add(button_num5);
  81. 		panel_keys.add(button_num6);panel_keys.add(button_multiplication);
  82. 		panel_keys.add(button_num1);panel_keys.add(button_num2);
  83. 		panel_keys.add(button_num3);panel_keys.add(button_cut);
  84. 		panel_keys.add(button_num0);panel_keys.add(button_point);
  85. 		panel_keys.add(button_equal);panel_keys.add(button_add);
  86. 		//加入事件（匿名内部类）
  87. 		button_num0.addActionListener(new ActionListener() {
  88. 			public void actionPerformed(ActionEvent e) {
  89. 					if (text_show.getText().equals("0")) {
  90. 						text_show.setText("");
  91. 					}
  92. 					str = text_show.getText() + "0";
  93. 					text_show.setText(str);
  94. 			}
  95. 		});
  97. 		button_num1.addActionListener(new ActionListener() {
  98. 			public void actionPerformed(ActionEvent e) {
  99. 				if (operator != 5) {
  100. 					if (text_show.getText().equals("0")) {
  101. 						text_show.setText("");
  102. 					}
  103. 					str = text_show.getText() + "1";
  104. 					text_show.setText(str);
  105. 				}
  106. 				else {
  107. 					setClear();
  108. 					str = text_show.getText() + "1";
  109. 					text_show.setText(str);
  110. 				}
  111. 			}
  112. 		});
  114. 		button_num2.addActionListener(new ActionListener() {
  115. 			public void actionPerformed(ActionEvent e) {
  116. 				if (operator != 5) {
  117. 					if (text_show.getText().equals("0")) {
  118. 						text_show.setText("");
  119. 					}
  120. 					str = text_show.getText() + "2";
  121. 					text_show.setText(str);
  122. 				}
  123. 				else {
  124. 					setClear();
  125. 					str = text_show.getText() + "2";
  126. 					text_show.setText(str);
  127. 				}
  128. 			}
  129. 		});
  131. 		button_num3.addActionListener(new ActionListener() {
  132. 			public void actionPerformed(ActionEvent e) {
  133. 				if (operator != 5) {
  134. 					if (text_show.getText().equals("0")) {
  135. 						text_show.setText("");
  136. 					}
  137. 					str = text_show.getText() + "3";
  138. 					text_show.setText(str);
  139. 				}
  140. 				else {
  141. 					setClear();
  142. 					str = text_show.getText() + "3";
  143. 					text_show.setText(str);
  144. 				}
  145. 			}
  146. 		});
  148. 		button_num4.addActionListener(new ActionListener() {
  149. 			public void actionPerformed(ActionEvent e) {
  150. 				if (operator != 5) {
  151. 					if (text_show.getText().equals("0")) {
  152. 						text_show.setText("");
  153. 					}
  154. 					str = text_show.getText() + "4";
  155. 					text_show.setText(str);
  156. 				}
  157. 				else {
  158. 					setClear();
  159. 					str = text_show.getText() + "4";
  160. 					text_show.setText(str);
  161. 				}
  162. 			}
  163. 		});
  165. 		button_num5.addActionListener(new ActionListener() {
  166. 			public void actionPerformed(ActionEvent e) {
  167. 				if (operator != 5) {
  168. 					if (text_show.getText().equals("0")) {
  169. 						text_show.setText("");
  170. 					}
  171. 					str = text_show.getText() + "5";
  172. 					text_show.setText(str);
  173. 				}
  174. 				else {
  175. 					setClear();
  176. 					str = text_show.getText() + "5";
  177. 					text_show.setText(str);
  178. 				}
  179. 			}
  180. 		});
  182. 		button_num6.addActionListener(new ActionListener() {
  183. 			public void actionPerformed(ActionEvent e) {
  184. 				if (operator != 5) {
  185. 					if (text_show.getText().equals("0")) {
  186. 						text_show.setText("");
  187. 					}
  188. 					str = text_show.getText() + "6";
  189. 					text_show.setText(str);
  190. 				}
  191. 				else {
  192. 					setClear();
  193. 					str = text_show.getText() + "6";
  194. 					text_show.setText(str);
  195. 				}
  196. 			}
  197. 		});
  199. 		button_num7.addActionListener(new ActionListener() {
  200. 			public void actionPerformed(ActionEvent e) {
  201. 				if (operator != 5) {
  202. 					if (text_show.getText().equals("0")) {
  203. 						text_show.setText("");
  204. 					}
  205. 					str = text_show.getText() + "7";
  206. 					text_show.setText(str);
  207. 				}
  208. 				else {
  209. 					setClear();
  210. 					str = text_show.getText() + "7";
  211. 					text_show.setText(str);
  212. 				}
  213. 			}
  214. 		});
  216. 		button_num8.addActionListener(new ActionListener() {
  217. 			public void actionPerformed(ActionEvent e) {
  218. 				if (operator != 5) {
  219. 					if (text_show.getText().equals("0")) {
  220. 						text_show.setText("");
  221. 					}
  222. 					str = text_show.getText() + "8";
  223. 					text_show.setText(str);
  224. 				}
  225. 				else {
  226. 					setClear();
  227. 					str = text_show.getText() + "8";
  228. 					text_show.setText(str);
  229. 				}
  230. 			}
  231. 		});
  233. 		button_num9.addActionListener(new ActionListener() {
  234. 			public void actionPerformed(ActionEvent e) {
  235. 				if (operator != 5) {
  236. 					if (text_show.getText().equals("0")) {
  237. 						text_show.setText("");
  238. 					}
  239. 					str = text_show.getText() + "9";
  240. 					text_show.setText(str);
  241. 				}
  242. 				else {
  243. 					setClear();
  244. 					str = text_show.getText() + "9";
  245. 					text_show.setText(str);
  246. 				}
  247. 			}
  248. 		});
  250. 		button_point.addActionListener(new ActionListener() {
  251. 			public void actionPerformed(ActionEvent e) {
  252. 				if(count_point==0){
  253. 					str=text_show.getText()+".";
  254. 					text_show.setText(str);
  255. 					count_point++;
  256. 				}
  257. 				else{//假设小数点个数超过一个就不再输入小数点
  258. 					return;
  259. 				}
  260. 			}
  261. 		});
  263. 		button_C.addActionListener(new ActionListener() {
  264. 			public void actionPerformed(ActionEvent e) {//所有清空，包含数据和运算符
  265. 				setClear();
  266. 				text_show.setText("0");
  267. 			}
  268. 		});
  270. 		button_CE.addActionListener(new ActionListener() {
  271. 			public void actionPerformed(ActionEvent e) {
  272. 				if(operator==5){//对于按过等号的数据。则所有清空
  273. 					num_record=0;
  274. 					str="";
  275. 					text_show.setText("0");
  276. 				}
  277. 				else{//没按过等号的从低到高位依次降低位数
  278. 					if(str.length()!=0){//假设显示框中的数据长度不为0
  279. 						str=text_show.getText();
  280. 						str=str.substring(0,str.length()-1);
  281. 						if(str.length()>1){
  282. 							text_show.setText(str);
  283. 						}
  284. 						else{
  285. 							str="";
  286. 							text_show.setText("0");
  287. 						}
  288. 					}
  289. 				}
  290. 			}
  291. 		});
  293. 		button_add.addActionListener(new ActionListener() {
  294. 			public void actionPerformed(ActionEvent e) {
  295. 				if (str.equals("")) {}
  296. 				else {
  297. 					switch (operator) {
  298. 					case 0:
  299. 						num_record = Double.parseDouble(str);break;
  300. 					case 1:
  301. 						num_record = num_record + Double.parseDouble(str);break;
  302. 					case 2:
  303. 						num_record = num_record - Double.parseDouble(str);break;
  304. 					case 3:
  305. 						num_record = num_record * Double.parseDouble(str);break;
  306. 					case 4:
  307. 						num_record = num_record / Double.parseDouble(str);break;
  308. 					case 5:break;
  309. 					}
  310. 					show_str=show_str+text_show.getText()+"+";
  311. 					text_show1.setText(show_str);
  312. 					str="";
  313. 					text_show.setText("");
  314. 					operator=1;
  315. 				}
  316. 			}
  317. 		});
  319. 		button_cut.addActionListener(new ActionListener() {
  320. 			public void actionPerformed(ActionEvent e) {
  321. 				if(text_show.getText().equals("0")){
  322. 					if(operator==0){//负号的功能
  323. 						str="-";
  324. 						text_show.setText(str);
  325. 					}
  326. 					else{
  327. 						return;
  328. 					}
  329. 				}
  330. 				else{
  331. 					if (str.equals("")) {}
  332. 					else {
  333. 						switch (operator) {
  334. 						case 0:
  335. 							num_record = Double.parseDouble(str);break;
  336. 						case 1:
  337. 							num_record = num_record + Double.parseDouble(str);break;
  338. 						case 2:
  339. 							num_record = num_record - Double.parseDouble(str);break;
  340. 						case 3:
  341. 							num_record = num_record * Double.parseDouble(str);break;
  342. 						case 4:
  343. 							num_record = num_record / Double.parseDouble(str);break;
  344. 						case 5:break;
  345. 						}
  346. 						show_str=show_str+text_show.getText()+"-";
  347. 						text_show1.setText(show_str);
  348. 						str="";
  349. 						text_show.setText("");
  350. 						operator=2;
  351. 					}
  352. 				}
  353. 			}
  354. 		});
  356. 		button_multiplication.addActionListener(new ActionListener() {
  357. 			public void actionPerformed(ActionEvent e) {
  358. 				if (str.equals("")) {}
  359. 				else {
  360. 					switch (operator) {
  361. 					case 0:
  362. 						num_record = Double.parseDouble(str);break;
  363. 					case 1:
  364. 						num_record = num_record + Double.parseDouble(str);break;
  365. 					case 2:
  366. 						num_record = num_record - Double.parseDouble(str);break;
  367. 					case 3:
  368. 						num_record = num_record * Double.parseDouble(str);break;
  369. 					case 4:
  370. 						num_record = num_record / Double.parseDouble(str);break;
  371. 					case 5:break;
  372. 					}
  373. 					show_str = show_str + text_show.getText() + "*";
  374. 					text_show1.setText(show_str);
  375. 					str="";
  376. 					text_show.setText("");
  377. 					operator=3;
  378. 				}
  379. 			}
  380. 		});
  382. 		button_division.addActionListener(new ActionListener() {
  383. 			public void actionPerformed(ActionEvent e) {
  384. 				if (str.equals("")) {}
  385. 				else {
  386. 					switch (operator) {
  387. 					case 0:
  388. 						num_record = Double.parseDouble(str);break;
  389. 					case 1:
  390. 						num_record = num_record + Double.parseDouble(str);break;
  391. 					case 2:
  392. 						num_record = num_record - Double.parseDouble(str);break;
  393. 					case 3:
  394. 						num_record = num_record * Double.parseDouble(str);break;
  395. 					case 4:
  396. 						num_record = num_record / Double.parseDouble(str);break;
  397. 					case 5:break;
  398. 					}
  399. 				}
  400. 				show_str = show_str + text_show.getText()+"/";
  401. 				text_show1.setText(show_str);
  402. 				str="";
  403. 				text_show.setText("");
  404. 				operator=4;
  405. 			}
  406. 		});
  408. 		button_equal.addActionListener(new ActionListener() {
  409. 			public void actionPerformed(ActionEvent e) {
  410. 				if (str.equals("")) {}
  411. 				else {
  412. 					switch (operator) {
  413. 					case 0:
  414. 						num_record = Double.parseDouble(str);break;
  415. 					case 1:
  416. 						num_record = num_record + Double.parseDouble(str);break;
  417. 					case 2:
  418. 						num_record = num_record - Double.parseDouble(str);break;
  419. 					case 3:
  420. 						num_record = num_record * Double.parseDouble(str);break;
  421. 					case 4:
  422. 						num_record = num_record / Double.parseDouble(str);break;
  423. 					case 5:break;
  424. 					}
  425. 				}
  426. 				show_str="";
  427. 				//输出显示
  428. 				text_show1.setText("");
  429. 				if(num_record-(int)num_record==0){
  430. 					text_show.setText(""+(int)num_record);
  431. 				}
  432. 				else{//保留总共15位数字，确保显示框能装下
  433. 					if((""+num_record).length()>15){
  434. 						text_show.setText((""+num_record).substring(0,15));
  435. 					}
  436. 					else{
  437. 						text_show.setText(""+num_record);
  438. 					}
  439. 				}
  440. 				operator=5;
  441. 			}
  442. 		});
  443. 	}
  445. 	public void setClear(){//清除
  446. 		num_record=0;
  447. 		operator=0;
  448. 		count_point=0;
  449. 		str="";
  450. 		text_show.setText("");
  451. 		show_str="";
  452. 		text_show1.setText("");
  453. 	}
  455. 	public static void main(String args[]) {
  456. 		new Calculator2("计算器v1.02");
  457. 	}
  458. }

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