分割字符串的数字列表

我有一个String的列表，并没有正则表达式的技能。 所以我需要你的帮助。

第一串：

 [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] 

和其他字符串…

目标：

我需要提取每个数字行作为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: 

PS将非常感谢任何在线技能正则表达式的在线培训工具。

Answer 1

这个适用于javascript /^(\d+)/gm

https://regex101.com/r/fZ9lV1/1

Answer 2

我会走这条路：

1. 定义一个类来解析行和文本..（你将需要那个排序最终List ）

    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. 阅读和解析List找到的所有行（你是对的，正则表达式是获得它的一种方法）

3. 使用Collections.sort对列表进行排序…

4. 打印

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)); } } 

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这是一个正则表达式的好起点 。

Answer 3

我希望你的正则表达式看起来像下面的^(\d+.*)其中

 ^ - start of line \d+ - any non zero amount of numbers .* - any symbols ( ) - grouping 

你可以在rubular.com上玩