在java中识别一串字符串中的编号系统/序列/模式

Question

我有一串这样的弦

1. INTRODUCTION
2. BASICS
3. ADVANCED CONCEPTS
4. EXAMPLES

上面的每一行都是一个单独的字符串。相同的字符串可以如下所示-

A. INTRODUCTION
B. BASICS
C. .. 

或作为

I) INTRODUCTION
II) BASICS
III) ...

或作为

10.01 INTRODUCTION
10.02 BASICS
...

因此，我试图识别（并可能消除）这些字符串之间存在的任何类型（数字、浮点数、罗马数字和完全未知的类型）的序列。 在java中实现这一点的最佳方法是什么

Answer 1

你是想在中间的空间分裂吗

public class TestApp {
    public static void main(String[] args)  {
        String[] strings = new String[] {
                "1. INTRODUCTION",
                "2. BASICS",
                "3. ADVANCED CONCEPTS",
                "4. EXAMPLES"};

        for(String string : strings) {
            String[] tokens = string.split(" ");
            System.out.println("[" + string + "][" + tokens[0] + "][" + tokens[1] + "]");
        }
    }
}

输出为

[1. INTRODUCTION][1.][INTRODUCTION]
[2. BASICS][2.][BASICS]
[3. ADVANCED CONCEPTS][3.][ADVANCED]
[4. EXAMPLES][4.][EXAMPLES]

如果您知道您的模式，请使用这样一个简单的设计模式

public class TestApp {

  private static IPatternStripper[] STRIPPERS = new IPatternStripper[] {
    new NumeralStripper()
    // more types here ...
  };

  public static void main(String[] args)  {

    String[] strings = new String[] {
        "1. INTRODUCTION",
        "2. BASICS",
        "3. ADVANCED CONCEPTS",
            "4. EXAMPLES"};

    for(String string : strings) {
      IPatternStripper foundStripper = null;
      for(IPatternStripper stripper : STRIPPERS) {
        if(stripper.isPatternApplicable(string)) {
          foundStripper = stripper;
          break;
        }
      }
      if(foundStripper != null) {
        System.out.println("SUCCESS: " + foundStripper.stripPattern(string));
      }
      else {
        System.out.println("ERROR: NO STRIPPER CAN PROCESS: " + string);
      }
    }
  }
}

interface IPatternStripper {  
  public boolean isPatternApplicable(String line);  
  public String stripPattern(String line);
}

class NumeralStripper implements IPatternStripper {

  @Override
  public boolean isPatternApplicable(String line) {
    boolean result = false;

    // code here checks whether this stripper is appropriate    
    return result;
  }

  @Override
  public String stripPattern(String line) {
    String value = line;
    // code here to do your stripping
    return value;
  }
}