将0-999的整数转化为对应的英文

Posted 2020-10-11 勇闯天涯zfc

将0-999的整数转化为对应的英文

一、源代码：EnglishNumberFormatter.java

 1 package cn.com.zfc.example;
 2 
 3 import java.util.Scanner;
 4 
 5 /**
 6  * 将0-999的整数转化为对应的英文
 7  * 
 8  * @author zfc
 9  *
10  */
11 public class EnglishNumberFormatter {
12     private static final String[] BITS = { "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT,", "NINE",
13             "TEN" };
14     private static final String[] TEENS = { "ELEVEN", "TWELF", "THIRTEEN", "FOURTEEN", "FIFTEEN", "SIXTEEN", "SEVETEEN",
15             "EIGHTEEN", "NIGHTEEN" };
16     private static final String[] TIES = { "TWENTY", "THRITY", "FORTY", "FIFTY", "SIXTY", "SEVENTY", "EIGHTY",
17             "NINETY" };
18 
19     public static void main(String[] args) {
20         Scanner scanner = new Scanner(System.in);
21         System.out.print("Please type a number between 0 and 999: ");
22         int num = scanner.nextInt();
23         scanner.close();
24         String english = toEnglish(num);
25         System.out.println(english);
26     }
27 
28     private static String toEnglish(int num) {
29         if (num == 0) {
30             return "Zero";
31         }
32         StringBuffer buffer = new StringBuffer();
33         if (num >= 100) {
34             buffer.append(pickHunder(num));
35             if (num % 100 != 0) {
36                 buffer.append(" AND ");
37             }
38             num -= (num / 100) * 100;
39         }
40         boolean largerThan20 = false;
41         if (num >= 20) {
42             largerThan20 = true;
43             buffer.append(pickTies(num));
44             num -= (num / 10) * 10;
45         }
46         if (!largerThan20 && num > 10) {
47             buffer.append(pickTeens(num));
48             num = 0;
49         }
50         if (num > 0) {
51             String bit = pickBits(num);
52             if (largerThan20) {
53                 buffer.append(" ");
54             }
55             buffer.append(bit);
56         }
57         return buffer.toString();
58     }
59 
60     private static String pickHunder(int num) {
61         int hunder = num / 100;
62         return BITS[hunder - 1] + " HUNDER";
63     }
64 
65     private static String pickTies(int num) {
66         int ties = num / 10;
67         return TIES[ties - 2];
68     }
69 
70     private static String pickTeens(int num) {
71         return TEENS[num - 11];
72     }
73 
74     private static String pickBits(int num) {
75         return BITS[num - 1];
76     }
77 }

二、运行效果