PatternSyntaxException (Java SE 9 & JDK 9 )

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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

All Methods
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 inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from class java.lang.Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

- 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

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