在Java中将单词转换为数字

问题描述

我见过很多算法，你给他们一个数字说123，然后把它转换成123。但我似乎无法找到相反的东西，而我确实找到的只能达到数字1000，任何人都可以用正确的方式指导我，因为我可以做的就是创建一个方法一千二百三十四并且返回1234

I have seen a lot of algorithms in which you give them a number say "123" and it converts it to One hundred twenty three. But i can't seem to find something that does the opposite, and the ones i did find only do it up to the number 1000, can anyone direct me in the correct way as what i could do to create a method that takes "One thousand two hundred and thirty four" and gives back "1234"

推荐答案

我希望下面的代码可以完成大部分工作案例。但是可能需要进行一些修改，因为我还没有正确测试。

I hope below code will do the job in most of the cases. However some modification might be required as I've not tested properly yet.

假设：

1. 不允许使用正数，负数，加号，减号。


2. Lac，不允许使用crore。


3. 仅支持英语。

如果你需要支持前两个点，你可以很容易地做到这一点。

If you need to support first two points, you can very easily do that.

    boolean isValidInput = true;
    long result = 0;
    long finalResult = 0;
    List<String> allowedStrings = Arrays.asList
    (
    "zero","one","two","three","four","five","six","seven",
    "eight","nine","ten","eleven","twelve","thirteen","fourteen",
    "fifteen","sixteen","seventeen","eighteen","nineteen","twenty",
    "thirty","forty","fifty","sixty","seventy","eighty","ninety",
    "hundred","thousand","million","billion","trillion"
    );

    String input="One hundred two thousand and thirty four";

    if(input != null && input.length()> 0)
    {
        input = input.replaceAll("-", " ");
        input = input.toLowerCase().replaceAll(" and", " ");
        String[] splittedParts = input.trim().split("\\s+");

        for(String str : splittedParts)
        {
            if(!allowedStrings.contains(str))
            {
                isValidInput = false;
                System.out.println("Invalid word found : "+str);
                break;
            }
        }
        if(isValidInput)
        {
            for(String str : splittedParts)
            {
                if(str.equalsIgnoreCase("zero")) {
                    result += 0;
                }
                else if(str.equalsIgnoreCase("one")) {
                    result += 1;
                }
                else if(str.equalsIgnoreCase("two")) {
                    result += 2;
                }
                else if(str.equalsIgnoreCase("three")) {
                    result += 3;
                }
                else if(str.equalsIgnoreCase("four")) {
                    result += 4;
                }
                else if(str.equalsIgnoreCase("five")) {
                    result += 5;
                }
                else if(str.equalsIgnoreCase("six")) {
                    result += 6;
                }
                else if(str.equalsIgnoreCase("seven")) {
                    result += 7;
                }
                else if(str.equalsIgnoreCase("eight")) {
                    result += 8;
                }
                else if(str.equalsIgnoreCase("nine")) {
                    result += 9;
                }
                else if(str.equalsIgnoreCase("ten")) {
                    result += 10;
                }
                else if(str.equalsIgnoreCase("eleven")) {
                    result += 11;
                }
                else if(str.equalsIgnoreCase("twelve")) {
                    result += 12;
                }
                else if(str.equalsIgnoreCase("thirteen")) {
                    result += 13;
                }
                else if(str.equalsIgnoreCase("fourteen")) {
                    result += 14;
                }
                else if(str.equalsIgnoreCase("fifteen")) {
                    result += 15;
                }
                else if(str.equalsIgnoreCase("sixteen")) {
                    result += 16;
                }
                else if(str.equalsIgnoreCase("seventeen")) {
                    result += 17;
                }
                else if(str.equalsIgnoreCase("eighteen")) {
                    result += 18;
                }
                else if(str.equalsIgnoreCase("nineteen")) {
                    result += 19;
                }
                else if(str.equalsIgnoreCase("twenty")) {
                    result += 20;
                }
                else if(str.equalsIgnoreCase("thirty")) {
                    result += 30;
                }
                else if(str.equalsIgnoreCase("forty")) {
                    result += 40;
                }
                else if(str.equalsIgnoreCase("fifty")) {
                    result += 50;
                }
                else if(str.equalsIgnoreCase("sixty")) {
                    result += 60;
                }
                else if(str.equalsIgnoreCase("seventy")) {
                    result += 70;
                }
                else if(str.equalsIgnoreCase("eighty")) {
                    result += 80;
                }
                else if(str.equalsIgnoreCase("ninety")) {
                    result += 90;
                }
                else if(str.equalsIgnoreCase("hundred")) {
                    result *= 100;
                }
                else if(str.equalsIgnoreCase("thousand")) {
                    result *= 1000;
                    finalResult += result;
                    result=0;
                }
                else if(str.equalsIgnoreCase("million")) {
                    result *= 1000000;
                    finalResult += result;
                    result=0;
                }
                else if(str.equalsIgnoreCase("billion")) {
                    result *= 1000000000;
                    finalResult += result;
                    result=0;
                }
                else if(str.equalsIgnoreCase("trillion")) {
                    result *= 1000000000000L;
                    finalResult += result;
                    result=0;
                }
            }

            finalResult += result;
            result=0;
            System.out.println(finalResult);
        }
    }

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