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
| import javax.swing.JOptionPane;
public class VOTE {
private int num;
private int[] sums; //每個選項的計票數列
private boolean exit;
private String scr;
private String[] names;//選單選項的字串數列
private int exitnum;//選單選項字串最後一個
public void run() {
do {
exit = true;
// 顯示選單();
輸入選項();
唱票();
計票();
顯示結果();
} while (exit);
}
public VOTE(String... names) { //建構子
this.names = names;
sums = new int[names.length];//得票數的陣列數量
exitnum = names.length + 1;
}
private void 顯示選單() {
String s = "";
for (int i = 0; i < names.length; i++) {
int a = i + 1;
s += a + ". " + names[i] + "\n";
}
scr = JOptionPane.showInputDialog(s + exitnum + ". EXIT");//視覺化
}
private void 輸入選項() {
do { //當輸入錯誤時，重複進行顯示選單
this.顯示選單();
try {
num = Integer.parseInt(scr);
if (num > exitnum || num < 1) {
JOptionPane.showMessageDialog(null, "錯誤的選項");
} else if(num==exitnum){
exit=false;
}
} catch (NumberFormatException e) {
JOptionPane.showMessageDialog(null, "請輸入數字");
System.err.println("訊息：" + e.getMessage());
num=0;//非第一次會記憶num上ㄧ次的值，強制num改回0
} catch (NullPointerException e) {
System.err.println("發生null值，物件不存在");
System.err.println(e.getMessage());
num=0;//非第一次會記憶num上ㄧ次的值，強制num改回0
}
} while (num > exitnum || num < 1);
}
private void 唱票() {
if (num>0 && num<exitnum) {
int index = num - 1;
JOptionPane.showMessageDialog(null, names[index] + " 1票");
}
}
private void 計票() {
if (num>0 && num<exitnum) {
int index = num - 1;
sums[index]++;
}
}
private void 顯示結果() {
String s = "";
for (int i = 0; i < names.length; i++) {
int a = i + 1;
s += a + ". " + names[i] + " 獲得 " + sums[i] + " 票\n";
}
JOptionPane.showMessageDialog(null, s);
}
}
|
沒有留言:
張貼留言