質問編集履歴
3
タイトル変更
test
CHANGED
@@ -1 +1 @@
|
|
1
|
-
java
|
1
|
+
java calculation
|
test
CHANGED
File without changes
|
2
コマンド修正
test
CHANGED
File without changes
|
test
CHANGED
@@ -3,171 +3,7 @@
|
|
3
3
|
import java.awt.event.*;
|
4
4
|
import javax.swing.JTextField;
|
5
5
|
|
6
|
-
class Key extends Panel {
|
7
|
-
/**
|
8
|
-
*
|
9
|
-
*/
|
10
|
-
private static final long serialVersionUID = 1L;
|
11
|
-
Button k0, k1, k2, k3, k4, k5, k6, k7, k8, k9, kd, km, ks, ka, kdp, ke;
|
12
|
-
|
13
|
-
Button createButton(String k, ActionListener listener) {
|
14
|
-
Button b = new Button(k);
|
15
|
-
|
16
|
-
add(b);
|
17
|
-
|
18
|
-
if (listener != null) {
|
19
|
-
b.addActionListener(listener);
|
20
|
-
}
|
21
|
-
return b;
|
22
|
-
}
|
23
|
-
|
24
|
-
Key(ActionListener listener) {
|
25
|
-
setLayout(new GridLayout(4, 4));
|
26
|
-
setFont(new Font("Courier", Font.BOLD, 20));
|
27
|
-
|
28
|
-
k7 = createButton("7", listener);
|
29
|
-
k8 = createButton("8", listener);
|
30
|
-
k9 = createButton("9", listener);
|
31
|
-
kd = createButton("/", listener);
|
32
|
-
k4 = createButton("4", listener);
|
33
|
-
k5 = createButton("5", listener);
|
34
|
-
k6 = createButton("6", listener);
|
35
|
-
km = createButton("*", listener);
|
36
|
-
k1 = createButton("1", listener);
|
37
|
-
k2 = createButton("2", listener);
|
38
|
-
k3 = createButton("3", listener);
|
39
|
-
ks = createButton("-", listener);
|
40
|
-
k0 = createButton("0", listener);
|
41
|
-
kdp = createButton(".", listener);
|
42
|
-
ke = createButton("=", listener);
|
43
|
-
ka = createButton("+", listener);
|
44
|
-
}
|
45
|
-
}
|
46
|
-
|
47
|
-
class Test extends Panel implements ActionListener {
|
48
|
-
/**
|
49
|
-
*
|
50
|
-
*/
|
51
|
-
private static final long serialVersionUID = 1L;
|
52
|
-
static double a = 0, b = 0, r = 0;
|
53
|
-
static int op = 0;
|
54
|
-
|
55
|
-
JTextField t;
|
56
|
-
Key key;
|
57
|
-
int il;
|
58
|
-
|
59
|
-
public void actionPerformed(ActionEvent e) {
|
60
|
-
if (e.getActionCommand() == "0") {
|
61
|
-
t.setText(t.getText().concat("0"));
|
62
|
-
} else if (e.getActionCommand() == "1") {
|
63
|
-
t.setText(t.getText().concat("1"));
|
64
|
-
} else if (e.getActionCommand() == "2") {
|
65
|
-
t.setText(t.getText().concat("2"));
|
66
|
-
} else if (e.getActionCommand() == "3") {
|
67
|
-
t.setText(t.getText().concat("3"));
|
68
|
-
} else if (e.getActionCommand() == "4") {
|
69
|
-
t.setText(t.getText().concat("4"));
|
70
|
-
} else if (e.getActionCommand() == "5") {
|
71
|
-
t.setText(t.getText().concat("5"));
|
72
|
-
} else if (e.getActionCommand() == "6") {
|
73
|
-
t.setText(t.getText().concat("6"));
|
74
|
-
} else if (e.getActionCommand() == "7") {
|
75
|
-
t.setText(t.getText().concat("7"));
|
76
|
-
} else if (e.getActionCommand() == "8") {
|
77
|
-
t.setText(t.getText().concat("8"));
|
78
|
-
} else if (e.getActionCommand() == "9") {
|
79
|
-
t.setText(t.getText().concat("9"));
|
80
|
-
} else if (e.getActionCommand() == ".") {
|
81
|
-
t.setText(t.getText().concat("."));
|
82
|
-
}
|
83
|
-
|
84
|
-
if (e.getActionCommand() == "+") {
|
85
|
-
a = Double.parseDouble(t.getText());
|
86
|
-
op = 1;
|
87
|
-
t.setText("");
|
88
|
-
} else if (e.getActionCommand() == "-") {
|
89
|
-
a = Double.parseDouble(t.getText());
|
90
|
-
op = 2;
|
91
|
-
t.setText("");
|
92
|
-
} else if (e.getActionCommand() == "*") {
|
93
|
-
a = Double.parseDouble(t.getText());
|
94
|
-
op = 3;
|
95
|
-
t.setText("");
|
96
|
-
} else if (e.getActionCommand() == "/") {
|
97
|
-
a = Double.parseDouble(t.getText());
|
98
|
-
op = 4;
|
99
|
-
t.setText("");
|
100
|
-
} else if (e.getActionCommand() == "=") {
|
101
|
-
b = Double.parseDouble(t.getText());
|
102
|
-
|
103
|
-
switch (op) {
|
104
|
-
case 1:
|
105
|
-
r = a + b;
|
106
|
-
break;
|
107
|
-
case 2:
|
108
|
-
r = a - b;
|
109
|
-
break;
|
110
|
-
case 3:
|
111
|
-
r = a * b;
|
112
|
-
break;
|
113
|
-
case 4:
|
114
|
-
r = a / b;
|
115
|
-
break;
|
116
|
-
default:
|
117
|
-
r = 0;
|
118
|
-
}
|
119
|
-
t.setText("" + r);
|
120
|
-
}
|
121
|
-
}
|
122
|
-
|
123
|
-
public void init() {
|
124
|
-
setLayout(new BorderLayout());
|
125
|
-
|
126
|
-
key = new Key(this);
|
127
|
-
t = new JTextField();
|
128
|
-
t.setHorizontalAlignment(JTextField.RIGHT);
|
129
|
-
t.setPreferredSize(new Dimension(50, 30));
|
130
|
-
t.setFont(new Font("Courier", Font.BOLD, 15));
|
131
|
-
|
132
|
-
add(t, "North");
|
133
|
-
add(key, "Center");
|
134
|
-
}
|
135
|
-
|
136
|
-
public void start() {
|
137
|
-
il = 0;
|
138
|
-
|
139
|
-
t.setText(String.valueOf(il));
|
140
|
-
}
|
141
|
-
|
142
|
-
public static void main(String[] args) {
|
143
|
-
Frame fr = new Frame("Calc");
|
144
|
-
Test test = new Test();
|
145
|
-
|
146
|
-
fr.addWindowListener(new WindowAdapter() {
|
147
|
-
public void windowClosing(WindowEvent e) {
|
148
|
-
System.exit(0);
|
149
|
-
}
|
150
|
-
});
|
151
|
-
|
152
|
-
test.init();
|
153
|
-
|
154
|
-
fr.add(test, "Center");
|
155
|
-
fr.pack();
|
156
|
-
|
157
|
-
test.start();
|
158
|
-
fr.setVisible(true);
|
159
|
-
}
|
160
|
-
}
|
161
6
|
|
162
7
|
```
|
163
8
|
|
164
|
-
javaで簡易電卓を作成しており、何とか計算結果が得られるところまで書くことはできましたが、あと少しで躓いています。
|
165
|
-
改善したい点は、
|
166
|
-
1.最初に表示される0を、数字を入力すると消えるようにしたい。
|
167
|
-
2.最初に0を続けて入力出来ないようにしたい。
|
168
|
-
3. 演算子や小数点を連続で押せないように(押しても反応しないように?)したい。
|
169
|
-
4.計算結果が〇.0の時に小数点を表示させないようにしたい。
|
170
9
|
|
171
|
-
どなたかこれらについて教えていただけませんか。
|
172
|
-
よろしくお願いします。
|
173
|
-
|
1
タイトル
test
CHANGED
@@ -1 +1 @@
|
|
1
|
-
java
|
1
|
+
java 電卓作成 改善方法
|
test
CHANGED
File without changes
|