FilesExpand file tree

main

/

Calculator.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

312 lines (260 loc) · 7.2 KB

main

/

Calculator.java

Copy path

Top

File metadata and controls

• Code
• Blame

312 lines (260 loc) · 7.2 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

package cal;

import java.awt.*;

import java.awt.event.*;

import javax.swing.JFrame;

import javax.swing.JButton;

import javax.swing.JTextField;

import javax.swing.JPanel;

public class Calculator extends JFrame implements ActionListener{

private JButton delBtn, clearBtn;

private JButton NumberBtn[];

private JButton functionBtn[];

private JButton Add_btn, Sub_btn, Mul_btn, Div_btn, equalBtn, decBtn;

private JPanel panel;

private JTextField text;

private double number, result = 0, current, temp = 0;

private char operator = ' ';

private int x = 0;

private String del= "", str = "";

public Calculator(){

initialize();

}

private void initialize(){

this.setSize(new Dimension(300, 420));

this.setLayout(null);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setResizable(false);

text = new JTextField();

text.setSize(new Dimension(250, 40));

text.setLocation(new Point(20, 20));

text.setFont(new Font("Orbitron", Font.PLAIN, 20));

text.setEditable(false);

text.setForeground(Color.black);

text.setHorizontalAlignment(JTextField.RIGHT);

panel = new JPanel();

panel.setLayout(new GridLayout(4, 4));

panel.setSize(new Dimension(250, 250));

panel.setLocation(new Point(20, 70));

Add_btn = new JButton("+");

Sub_btn = new JButton("-");

Mul_btn = new JButton("*");

Div_btn = new JButton("/");

equalBtn = new JButton("=");

decBtn = new JButton(".");

clearBtn = new JButton("CE");

clearBtn.setLocation(new Point(20, 330));

delBtn = new JButton("CLR");

delBtn.setLocation(new Point(170, 330));

functionBtn = new JButton[8];

functionBtn[0] = Add_btn;

functionBtn[1] = Sub_btn;

functionBtn[2] = Mul_btn;

functionBtn[3] = Div_btn;

functionBtn[4] = equalBtn;

functionBtn[5] = delBtn;

functionBtn[6] = clearBtn;

functionBtn[7] = decBtn;

for(int i = 0; i < 8; i++){

functionBtn[i].setFocusable(false);

functionBtn[i].setVerticalTextPosition(JButton.CENTER);

functionBtn[i].setHorizontalTextPosition(JButton.CENTER);

functionBtn[i].setFont(new Font("Orbitron", Font.PLAIN, 20));

functionBtn[i].setSize(new Dimension(100, 30));

functionBtn[i].addActionListener(this);

functionBtn[i].setForeground(Color.black);

}

NumberBtn = new JButton[10];

for(int i= 0; i < 10; i++){

NumberBtn[i] = new JButton(String.valueOf(i));

NumberBtn[i].setFocusable(false);

NumberBtn[i].setFont(new Font("Orbitron", Font.PLAIN, 20));

NumberBtn[i].setSize(new Dimension(10, 10));

NumberBtn[i].setVerticalTextPosition(JButton.CENTER);

NumberBtn[i].setHorizontalTextPosition(JButton.CENTER);

NumberBtn[i].addActionListener(this);

NumberBtn[i].setForeground(Color.black);

}

panel.add(NumberBtn[7]);

panel.add(NumberBtn[8]);

panel.add(NumberBtn[9]);

panel.add(functionBtn[0]);

panel.add(NumberBtn[6]);

panel.add(NumberBtn[5]);

panel.add(NumberBtn[4]);

panel.add(functionBtn[1]);

panel.add(NumberBtn[3]);

panel.add(NumberBtn[2]);

panel.add(NumberBtn[1]);

panel.add(functionBtn[2]);

panel.add(functionBtn[7]);

panel.add(NumberBtn[0]);

panel.add(functionBtn[4]);

panel.add(functionBtn[3]);

this.add(functionBtn[6]);

this.add(functionBtn[5]);

this.add(text);

this.add(panel);

this.setVisible(true);

this.setLocationRelativeTo(null);

}

private void operation(char opt, double curr){

switch(operator){

case '+':

result = number + curr;

break;

case '-':

result = number - curr;

break;

case '*':

result = number * curr;

break;

case '/':

result = number / curr;

break;

}

text.setText(String.valueOf(result));

temp = result;

x = 0;

}

@Override

public void actionPerformed(ActionEvent e){

//flag = false;

if(e.getSource() == functionBtn[0]){//addition

if (!text.getText().isEmpty()) {

current = Double.valueOf(text.getText());

if(operator != ' ' && operator != '+'){

operation(operator, current);

operator = ' ';

}

current = Double.valueOf(text.getText());

if(x == 0){

temp = current;

number = temp;

operator = '+';

x = 1;

}

else{

number = temp;

result = number + current;

text.setText(String.valueOf(result));

temp = result;

x = 1;

}

}

}

if(e.getSource() == functionBtn[1]){//substration

if(!text.getText().isEmpty()){

current = Double.valueOf(text.getText());

if(operator != ' ' && operator != '-'){

operation(operator, current);

operator = ' ';

}

current = Double.valueOf(text.getText());

if(x == 0){

temp = current;

number = temp;

operator = '-';

x = 1;

}

else{

number = temp;

result = number - current;

text.setText(String.valueOf(result));

temp = result;

x = 1;

}

}

}

if(e.getSource() == functionBtn[2]){//multiplication

if(!text.getText().isEmpty()){

current = Double.valueOf(text.getText());

if(operator != ' ' && operator != '*'){

operation(operator, current);

operator = ' ';

}

current = Double.valueOf(text.getText());

if(x == 0){

temp = current;

number = temp;

operator = '*';

x = 1;

}

else{

number = temp;

result = number * current;

text.setText(String.valueOf(result));

temp = result;

x = 1;

}

}

}

if(e.getSource() == functionBtn[3]){//division

if(!text.getText().isEmpty()){

current = Double.valueOf(text.getText());

if(operator != ' ' && operator != '/'){

operation(operator, current);

operator = ' ';

}

current = Double.valueOf(text.getText());

if(x == 0){

temp = current;

number = temp;

operator = '/';

x = 1;

}

else{

number = temp;

result = number / current;

text.setText(String.valueOf(result));

temp = result;

x = 1;

}

}

}

if(e.getSource() == functionBtn[4]){// equals operation

if(!text.getText().isEmpty()){

current = Double.valueOf(text.getText());

operation(operator, current);

operator = ' ';

}

}

if(e.getSource() == functionBtn[5]){// del function

text.setText("");

}

if(e.getSource() == functionBtn[6]){// clear function

result = 0;

x = 0;

temp = 0;

number = 0;

operator = ' ';

text.setText("");

}

if(e.getSource() == functionBtn[7]){ // decimal function

if(x == 1){

text.setText("");

if(!text.getText().contains(".")){

text.setText(text.getText().concat("."));

}

x = 0;

}else{

if(!text.getText().contains(".")){

text.setText(text.getText().concat("."));

}

}

}

for(int i = 0; i < 10; i++){ // number button

if(e.getSource() == NumberBtn[i]){

if(x == 1){

text.setText("");

text.setText(text.getText().concat(String.valueOf(i)));

x = 2;

}else{

text.setText(text.getText().concat(String.valueOf(i)));

}

}

}

}

public static void main(String args[]){

new Calculator();

}

}