java 数字 转为 英文
public class NumUtil {
public static final String[] enNum = { // 基本数词表
“zero”, “one”, “tow”, “three”, “four”, “five”, “six”, “seven”, “eight”,
“nine”, “ten”, “eleven”, “twelve”, “thirteen”, “fourteen”,
“fifteen”, “sixteen”, “seventeen”, “eighteen”, “nineteen”,
“twenty”, “”, “”, “”, “”, “”, “”, “”, “”, “”, “thirty”, “”, “”, “”,
“”, “”, “”, “”, “”, “”, “fourty”, “”, “”, “”, “”, “”, “”, “”, “”,
“”, “fifty”, “”, “”, “”, “”, “”, “”, “”, “”, “”, “sixty”, “”, “”,
“”, “”, “”, “”, “”, “”, “”, “seventy”, “”, “”, “”, “”, “”, “”, “”,
“”, “”, “eighty”, “”, “”, “”, “”, “”, “”, “”, “”, “”, “ninety” };
public static final String[] enUnit = { “hundred”, “thousand”, “million”,
“billion”, “trillion”, “quintillion” }; // 单位表
public static void main(String[] args) {
System.out.println(analyze(1)); // 测试数据
System.out.println(analyze(21));
System.out.println(analyze(105));
System.out.println(analyze(3250));
System.out.println(analyze(47826));
System.out.println(analyze(56945781));
}
public static String analyze(long num) { // long型参数，
return analyze(String.valueOf(num)); // 因为long型有极限，所以以字符串参数方法为主
}
public static String analyze(String num) { // 数字字符串参数
// 判断字符串是否为数字
if (!num.matches(“\\d+”)) {
return String.format(“%s is not number”, num);
}
num = num.replaceAll(“^[0]*([1-9]*)”, “$1”); // 把字符串前面的0去掉
if (num.length() == 0) { // 如果长度为0，则原串都是0
return enNum[0];
} else if (num.length() 9) { // 如果大于9，即大于999999999，题目限制条件
return “too big”;
}
// 按3位分割分组
int count = (num.length() % 3 == 0) ? num.length() / 3
: num.length() / 3 + 1;
if (count enUnit.length) {
return “too big”;
} // 判断组单位是否超过，
// 可以根据需求适当追加enUnit
String[] group = new String[count];
for (int i = num.length(), j = group.length – 1; i 0; i -= 3) {
group[j–] = num.substring(Math.max(i – 3, 0), i);
}
StringBuilder buf = new StringBuilder(); // 结果保存
for (int i = 0; i count; i++) { // 遍历分割的组
int v = Integer.valueOf(group[i]);
if (v = 100) { // 因为按3位分割，所以这里不会有超过999的数
buf.append(enNum[v / 100]).append(” “).append(enUnit[0])
.append(” “);
v = v % 100; // 获取百位，并得到百位以后的数
if (v != 0) {
buf.append(“and “);
} // 如果百位后的数不为0，则追加and
}
if (v != 0) { // 前提是v不为0才作解析
if (v 20 || v % 10 == 0) { // 如果小于20或10的整数倍，直接取基本数词表的单词
buf.append(enNum[v]).append(” “);
} else { // 否则取10位数词，再取个位数词
buf.append(enNum[v – v % 10]).append(” “);
buf.append(enNum[v % 10]).append(” “);
}
if (i != count – 1) { // 百位以上的组追加相应的单位
buf.append(enUnit[count – 1 – i]).append(” “);
}
}
}
return buf.toString().trim(); // 返回值
}
}
运行结果：
one
twenty one
one hundred and five
three thousand tow hundred and fifty
fourty seven thousand eight hundred and twenty six
fifty six million nine hundred and fourty five thousand seven hundred and eighty one
一个java的问题 讲输入的阿拉伯数字转换成英文
很简单的程序，我就不写注释了吧
import java.util.Scanner;
public class EnglishNumberFormatter {
private static final String[] BITS = {“ONE”, “TWO”, “THREE”, “FOUR”, “FIVE”,
“SIX”, “SEVEN”, “EIGHT,”, “NINE”, “TEN”};
private static final String[] TEENS = {“ELEVEN”, “TWELF”, “THIRTEEN”,
“FOURTEEN”, “FIFTEEN”, “SIXTEEN”, “SEVETEEN”, “EIGHTEEN”, “NIGHTEEN”};
private static final String[] TIES = {“TWENTY”, “THRITY”, “FORTY”, “FIFTY”,
“SIXTY”, “SEVENTY”, “EIGHTY”, “NINETY”};
private static Scanner sc;
public static void main(String[] args) {
sc = new Scanner(System.in);
int num = 0;
while(num != -1) {
System.out.print(“Please type a number between 0 and 999: “);
num = sc.nextInt();
if(num 0 || num 999) {
continue;
}
String english = toEnglish(num);
System.out.println(english);
}
System.out.println(“Thank you for using this program”);
}
private static String toEnglish(int num) {
if(num == 0) {
return “Zero”;
}
StringBuffer buffer = new StringBuffer();
if(num = 100) {
buffer.append(pickHunder(num));
if(num % 100 != 0) {
buffer.append(” AND “);
}
num -= (num / 100) * 100;
}
boolean largerThan20 = false;
if(num = 20) {
largerThan20 = true;
buffer.append(pickTies(num));
num -= (num / 10) * 10;
}
if(!largerThan20 num 10) {
buffer.append(pickTeens(num));
num = 0;
}
if(num 0) {
String bit = pickBits(num);
if(largerThan20) {
buffer.append(” “);
}
buffer.append(bit);
}
return buffer.toString();
}
private static String pickHunder(int num) {
int hunder = num / 100;
return BITS[hunder – 1] + ” HUNDER”;
}
private static String pickTies(int num) {
int ties = num / 10;
return TIES[ties – 2];
}
private static String pickTeens(int num) {
return TEENS[num – 11];
}
private static String pickBits(int num) {
return BITS[num – 1];
}
}
java如何将数字转换为英文
Java 数字转成英文
英文数词，按3位3位区分
Hundred: 100
Thousand:1,000
Million: 1,000,000
Billion: 1,000,000,000
Trillion: 1,000,000,000,000
Quintillion: 1,000,000,000,000,000,000
Sextillion: 1,000,000,000,000,000,000,000
Nonillion: 1,000,000,000,000,000,000,000,000,000,000
Centillion: 1 followed by 303 zeros
所以把数字字符串按3位分割，分别解析
public class NumUtil {
public static final String[] enNum = { // 基本数词表
“zero”, “one”, “tow”, “three”, “four”, “five”, “six”, “seven”, “eight”,
“nine”, “ten”, “eleven”, “twelve”, “thirteen”, “fourteen”,
“fifteen”, “sixteen”, “seventeen”, “eighteen”, “nineteen”,
“twenty”, “”, “”, “”, “”, “”, “”, “”, “”, “”, “thirty”, “”, “”, “”,
“”, “”, “”, “”, “”, “”, “fourty”, “”, “”, “”, “”, “”, “”, “”, “”,
“”, “fifty”, “”, “”, “”, “”, “”, “”, “”, “”, “”, “sixty”, “”, “”,
“”, “”, “”, “”, “”, “”, “”, “seventy”, “”, “”, “”, “”, “”, “”, “”,
“”, “”, “eighty”, “”, “”, “”, “”, “”, “”, “”, “”, “”, “ninety” };
public static final String[] enUnit = { “hundred”, “thousand”, “million”,
“billion”, “trillion”, “quintillion” }; // 单位表
public static void main(String[] args) {
System.out.println(analyze(1)); // 测试数据
System.out.println(analyze(21));
System.out.println(analyze(105));
System.out.println(analyze(3250));
System.out.println(analyze(47826));
System.out.println(analyze(56945781));
}
public static String analyze(long num) { // long型参数，
return analyze(String.valueOf(num)); // 因为long型有极限，所以以字符串参数方法为主
}
public static String analyze(String num) { // 数字字符串参数
// 判断字符串是否为数字
if (!num.matches(“\\d+”)) {
return String.format(“%s is not number”, num);
}
num = num.replaceAll(“^[0]*([1-9]*)”, “$1”); // 把字符串前面的0去掉
if (num.length() == 0) { // 如果长度为0，则原串都是0
return enNum[0];
} else if (num.length() 9) { // 如果大于9，即大于999999999，题目限制条件
return “too big”;
}
// 按3位分割分组
int count = (num.length() % 3 == 0) ? num.length() / 3
: num.length() / 3 + 1;
if (count enUnit.length) {
return “too big”;
} // 判断组单位是否超过，
// 可以根据需求适当追加enUnit
String[] group = new String[count];
for (int i = num.length(), j = group.length – 1; i 0; i -= 3) {
group[j–] = num.substring(Math.max(i – 3, 0), i);
}
StringBuilder buf = new StringBuilder(); // 结果保存
for (int i = 0; i count; i++) { // 遍历分割的组
int v = Integer.valueOf(group[i]);
if (v = 100) { // 因为按3位分割，所以这里不会有超过999的数
buf.append(enNum[v / 100]).append(” “).append(enUnit[0])
.append(” “);
v = v % 100; // 获取百位，并得到百位以后的数
if (v != 0) {
buf.append(“and “);
} // 如果百位后的数不为0，则追加and
}
if (v != 0) { // 前提是v不为0才作解析
if (v 20 || v % 10 == 0) { // 如果小于20或10的整数倍，直接取基本数词表的单词
buf.append(enNum[v]).append(” “);
} else { // 否则取10位数词，再取个位数词
buf.append(enNum[v – v % 10]).append(” “);
buf.append(enNum[v % 10]).append(” “);
}
if (i != count – 1) { // 百位以上的组追加相应的单位
buf.append(enUnit[count – 1 – i]).append(” “);
}
}
}
return buf.toString().trim(); // 返回值
}
}
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