java - 分割字符串的数字列表

Question

我有一个字符串列表，但没有正则表达式方面的技能。所以我需要你的帮助。

第一个字符串:

[begin]
65. This tutorial walks you through a series of exercises to get familiar with Kotlin. 
66. Kotlin Koans are a series of exercises to get you familiar with the Kotlin Syntax.
67. Each exercise is created as a failing unit test and your job is to make it pass. You can play with Koans online or offline by cloning the project on GitHub:
...
[end]

第二个字符串

[begin]
63. Download the Koans by cloning the project from GitHub
64. Open up the project in IntelliJ IDEA or your favorite editor. Note: If IntelliJ IDEA prompts you to update the Kotlin library, just click yes.
[end]

以及其他字符串...

目标:

我需要将每个数字行提取为String:

String#1 : 63. Download the Koans by cloning the project from GitHub
String#2 : 64. Open up the project in IntelliJ IDEA or your favorite editor. Note: If IntelliJ IDEA prompts you to update the Kotlin library, just click yes.
String#3 : 65. This tutorial walks you through a series of exercises to get familiar with Kotlin. 
String#4 : 66. Kotlin Koans are a series of exercises to get you familiar with the Kotlin Syntax.
String#5 : 67. Each exercise is created as a failing unit test and your job is to make it pass. You can play with Koans online or offline by cloning the project on GitHub:

附注将非常感谢任何用于技能提升正则表达式的在线培训工具。

Answer 1

我会这样走:

1. 定义一个类来解析行和文本..(您将需要它来对最终的列表进行排序)

   class TextLine implements Comparable<TextLine> {
   
       private int line;
       private String lineText;
   
       public TextLine(int line, String lineText) {
           this.line = line;
           this.lineText = lineText;
       }
   
       @Override
       public String toString() {
           return "String:" + line + lineText;
       }
   
       @Override
       public int compareTo(TextLine o) {
           return Integer.compare(this.line, o.line);
       }
   }
   

2. 读取并解析您在 List 中找到的所有行(您是对的，正则表达式是获取它的一种方法)

3. 使用Collections.sort对列表进行排序...

4. 打印

示例:

public class TestApp {

    private List<TextLine> output = new ArrayList<TextLine>();

    public static void main(String[] args) {
        TestApp tt = new TestApp();
        String str = "65. This tutorial walks you through a series of exercises to get familiar with Kotlin. ";
        tt.populateLsit(str);
        str = "67. Each exercise is created as a failing unit test and your job is to make it pass. You can play with Koans online or offline by cloning the project on GitHub:";
        tt.populateLsit(str);
        str = "66. Kotlin Koans are a series of exercises to get you familiar with the Kotlin Syntax. ";
        tt.populateLsit(str);
        str = "63. Download the Koans by cloning the project from GitHub";
        tt.populateLsit(str);
        str = "64. Open up the project in IntelliJ IDEA or your favorite editor. Note: If IntelliJ IDEA prompts you to update the Kotlin library, just click yes.";
        tt.populateLsit(str);
        tt.sortPrint();
    }

    private void sortPrint() {
        Collections.sort(output);
        System.out.println(output);

    }

    private void populateLsit(String str) {
        Matcher match = Pattern.compile("^(\\d+)|(.*)").matcher(str);
        // String r = match.group();
        match.find();
        int i = Integer.parseInt(match.group());
        match.find();
        String s = match.group();
        output.add(new TextLine(i, s));
    }
}

<小时/>

Here is a good starting point for regex .