PatternSyntaxException (Java SE 12 & JDK 12 )
Keywords: java.util.regex.PatternSyntaxException class

Module java.base
Package java.util.regex

## Class PatternSyntaxException

- java.lang.Object
- - java.lang.Throwable
  - - java.lang.Exception
    - - java.lang.RuntimeException
      - - java.lang.IllegalArgumentException
        - - java.util.regex.PatternSyntaxException

- All Implemented Interfaces:
    `Serializable`

      public class PatternSyntaxException
      extends IllegalArgumentException

  Unchecked exception thrown to indicate a syntax error in a regular-expression pattern.
  Since:
    1.4
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `PatternSyntaxException​(String desc, String regex, int index)` | Constructs a new instance of this class.

  - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `String` | `getDescription()` | Retrieves the description of the error.
    `int` | `getIndex()` | Retrieves the error index.
    `String` | `getMessage()` | Returns a multi-line string containing the description of the syntax error and its index, the erroneous regular-expression pattern, and a visual indication of the error index within the pattern.
    `String` | `getPattern()` | Retrieves the erroneous regular-expression pattern.

    - ### Methods declared in class java.lang.Throwable

      `addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

    - ### Methods declared in class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### PatternSyntaxException

          public PatternSyntaxException​(String desc,
                                        String regex,
                                        int index)

      Constructs a new instance of this class.
      Parameters:
        `desc` - A description of the error
        `regex` - The erroneous pattern
        `index` - The approximate index in the pattern of the error, or `-1` if the index is not known

  - ### Method Detail

    - #### getIndex

          public int getIndex()

      Retrieves the error index.
      Returns:
        The approximate index in the pattern of the error, or `-1` if the index is not known

    - #### getDescription

          public String getDescription()

      Retrieves the description of the error.
      Returns:
        The description of the error

    - #### getPattern

          public String getPattern()

      Retrieves the erroneous regular-expression pattern.
      Returns:
        The erroneous pattern

    - #### getMessage

          public String getMessage()

      Returns a multi-line string containing the description of the syntax error and its index, the erroneous regular-expression pattern, and a visual indication of the error index within the pattern.
      Overrides:
        `getMessage` in class `Throwable`
      Returns:
        The full detail message