Java 正则 - 模式语法异常

java.util.regex.PatternSyntaxException类表示抛出的未经检查的异常，以指示正则表达式模式中的语法错误。

类声明

以下是java.util.regex.PatternSyntaxException类的声明

public class PatternSyntaxException
   extends IllegalArgumentException

构造函数

类方法

下面的示例显示java.util.regex.Pattern.PatternSyntaxException类方法的用法。

链接：https://www.learnfk.comhttps://www.learnfk.com/javaregex/javaregex-patternsyntaxexception.html

来源：LearnFk无涯教程网

package com.learnfk;

import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

public class PatternSyntaxExceptionDemo {
   private static String REGEX="[";
   private static String INPUT="The dog says meow " + "All dogs say meow.";
   private static String REPLACE="cat";

   public static void main(String[] args) {
      try{
         Pattern pattern=Pattern.compile(REGEX);
         
         //获取匹配器对象
         Matcher matcher=pattern.matcher(INPUT); 
         INPUT=matcher.replaceAll(REPLACE);
      } catch(PatternSyntaxException e){
         System.out.println("PatternSyntaxException: ");
         System.out.println("Remark: "+ e.getRemark));
         System.out.println("Index: "+ e.getIndex());
         System.out.println("Message: "+ e.getMessage());
         System.out.println("Pattern: "+ e.getPattern());
      }
   }
}

让无涯教程编译并运行上述程序，这将产生以下输出-

PatternSyntaxException: 
Remark: Unclosed character class
Index: 0
Message: Unclosed character class near index 0
[
^
Pattern: [