# XPathException

public class **XPathException** extends [Exception](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Exception.html)  

|---|---|---|
| Known Direct Subclasses [XPathExpressionException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathExpressionException.html), [XPathFactoryConfigurationException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathFactoryConfigurationException.html) |---|---| | [XPathExpressionException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathExpressionException.html) | `XPathExpressionException` represents an error in an XPath expression. | | [XPathFactoryConfigurationException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathFactoryConfigurationException.html) | `XPathFactoryConfigurationException` represents a configuration error in a `XPathFactory` environment. | |||

|---|---|---|
| Known Indirect Subclasses [XPathFunctionException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathFunctionException.html) |---|---| | [XPathFunctionException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathFunctionException.html) | `XPathFunctionException` represents an error with an XPath function. | |||

`XPathException` represents a generic XPath exception.

<br />

### Public Constructor Summary

|---|---|
|   | [XPathException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathException.html#XPathException(java.lang.String))([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) message) Constructs a new `XPathException` with the specified detail `message`. |
|   | [XPathException](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathException.html#XPathException(java.lang.Throwable))([Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) cause) Constructs a new `XPathException` with the specified `cause`. |

### Public Method Summary

|---|---|
| [Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) | [getCause](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathException.html#getCause())() Returns the cause of this throwable or `null` if the cause is nonexistent or unknown. |
| void | [printStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathException.html#printStackTrace())() Prints this throwable and its backtrace to the standard error stream. |
| void | [printStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathException.html#printStackTrace(java.io.PrintWriter))([PrintWriter](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/PrintWriter.html) s) Prints this throwable and its backtrace to the specified print writer. |
| void | [printStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/javax/xml/xpath/XPathException.html#printStackTrace(java.io.PrintStream))([PrintStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/PrintStream.html) s) Prints this throwable and its backtrace to the specified print stream. |

### Inherited Method Summary

From class [java.lang.Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html)

|---|---|
| synchronized final void | [addSuppressed](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#addSuppressed(java.lang.Throwable))([Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) exception) Appends the specified exception to the exceptions that were suppressed in order to deliver this exception. |
| synchronized [Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) | [fillInStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#fillInStackTrace())() Fills in the execution stack trace. |
| synchronized [Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) | [getCause](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#getCause())() Returns the cause of this throwable or `null` if the cause is nonexistent or unknown. |
| [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [getLocalizedMessage](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#getLocalizedMessage())() Creates a localized description of this throwable. |
| [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [getMessage](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#getMessage())() Returns the detail message string of this throwable. |
| StackTraceElement\[\] | [getStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#getStackTrace())() Provides programmatic access to the stack trace information printed by `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#printStackTrace()`. |
| synchronized final [Throwable\[\]](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) | [getSuppressed](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#getSuppressed())() Returns an array containing all of the exceptions that were suppressed, typically by the `try`-with-resources statement, in order to deliver this exception. |
| synchronized [Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) | [initCause](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#initCause(java.lang.Throwable))([Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) cause) Initializes the *cause* of this throwable to the specified value. |
| void | [printStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#printStackTrace())() Prints this throwable and its backtrace to the standard error stream. |
| void | [printStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#printStackTrace(java.io.PrintWriter))([PrintWriter](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/PrintWriter.html) s) Prints this throwable and its backtrace to the specified print writer. |
| void | [printStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#printStackTrace(java.io.PrintStream))([PrintStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/PrintStream.html) s) Prints this throwable and its backtrace to the specified print stream. |
| void | [setStackTrace](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#setStackTrace(java.lang.StackTraceElement[]))(StackTraceElement\[\] stackTrace) Sets the stack trace elements that will be returned by `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#getStackTrace()` and printed by `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#printStackTrace()` and related methods. |
| [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [toString](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#toString())() Returns a short description of this throwable. |

From class [java.lang.Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html)

|---|---|
| [Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) | [clone](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#clone())() Creates and returns a copy of this `Object`. |
| boolean | [equals](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#equals(java.lang.Object))([Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) obj) Compares this instance with the specified object and indicates if they are equal. |
| void | [finalize](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#finalize())() Invoked when the garbage collector has detected that this instance is no longer reachable. |
| final [Class](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Class.html)\<?\> | [getClass](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#getClass())() Returns the unique instance of `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Class.html` that represents this object's class. |
| int | [hashCode](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#hashCode())() Returns an integer hash code for this object. |
| final void | [notify](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#notify())() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |
| final void | [notifyAll](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#notifyAll())() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |
| [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [toString](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#toString())() Returns a string containing a concise, human-readable description of this object. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait(long,%20int))(long timeout, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait(long))(long timeout) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait())() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object. |

## Public Constructors

#### public
**XPathException**
([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) message)

<br />

Constructs a new `XPathException` with the specified detail `message`.

The `cause` is not initialized.

If `message` is `null`, then a `NullPointerException` is thrown.

<br />

##### Parameters

| message | The detail message. |
|---|---|

#### public
**XPathException**
([Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html) cause)

<br />

Constructs a new `XPathException` with the specified `cause`.

If `cause` is `null`, then a `NullPointerException` is thrown.

<br />

##### Parameters

| cause | The cause. |
|---|---|

##### Throws

| [NullPointerException](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/NullPointerException.html) | if `cause` is `null`. |
|---|---|

## Public Methods

#### public [Throwable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html)
**getCause**
()

Returns the cause of this throwable or `null` if the
cause is nonexistent or unknown. (The cause is the throwable that
caused this throwable to get thrown.)

This implementation returns the cause that was supplied via one of
the constructors requiring a `Throwable`, or that was set after
creation with the `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#initCause(java.lang.Throwable)` method. While it is
typically unnecessary to override this method, a subclass can override
it to return a cause set by some other means. This is appropriate for
a "legacy chained throwable" that predates the addition of chained
exceptions to `Throwable`. Note that it is *not*
necessary to override any of the `PrintStackTrace` methods,
all of which invoke the `getCause` method to determine the
cause of a throwable.

##### Returns

- the cause of this throwable or `null` if the cause is nonexistent or unknown.

#### public void
**printStackTrace**
()

Prints this throwable and its backtrace to the
standard error stream. This method prints a stack trace for this
`Throwable` object on the error output stream that is
the value of the field `System.err`. The first line of
output contains the result of the `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#toString()` method for
this object. Remaining lines represent data previously recorded by
the method `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Throwable.html#fillInStackTrace()`. The format of this
information depends on the implementation, but the following
example may be regarded as typical:
>
> ```
>  java.lang.NullPointerException
>          at MyClass.mash(MyClass.java:9)
>          at MyClass.crunch(MyClass.java:6)
>          at MyClass.main(MyClass.java:3)
>  
> ```
This example was produced by running the program:

```
 class MyClass {
     public static void main(String[] args) {
         crunch(null);
     }
     static void crunch(int[] a) {
         mash(a);
     }
     static void mash(int[] b) {
         System.out.println(b[0]);
     }
 }
 
```
The backtrace for a throwable with an initialized, non-null cause should generally include the backtrace for the cause. The format of this information depends on the implementation, but the following example may be regarded as typical:

```
 HighLevelException: MidLevelException: LowLevelException
         at Junk.a(Junk.java:13)
         at Junk.main(Junk.java:4)
 Caused by: MidLevelException: LowLevelException
         at Junk.c(Junk.java:23)
         at Junk.b(Junk.java:17)
         at Junk.a(Junk.java:11)
         ... 1 more
 Caused by: LowLevelException
         at Junk.e(Junk.java:30)
         at Junk.d(Junk.java:27)
         at Junk.c(Junk.java:21)
         ... 3 more
 
```
Note the presence of lines containing the characters `"..."`. These lines indicate that the remainder of the stack trace for this exception matches the indicated number of frames from the bottom of the stack trace of the exception that was caused by this exception (the "enclosing" exception). This shorthand can greatly reduce the length of the output in the common case where a wrapped exception is thrown from same method as the "causative exception" is caught. The above example was produced by running the program:

```
 public class Junk {
     public static void main(String args[]) {
         try {
             a();
         } catch(HighLevelException e) {
             e.printStackTrace();
         }
     }
     static void a() throws HighLevelException {
         try {
             b();
         } catch(MidLevelException e) {
             throw new HighLevelException(e);
         }
     }
     static void b() throws MidLevelException {
         c();
     }
     static void c() throws MidLevelException {
         try {
             d();
         } catch(LowLevelException e) {
             throw new MidLevelException(e);
         }
     }
     static void d() throws LowLevelException {
        e();
     }
     static void e() throws LowLevelException {
         throw new LowLevelException();
     }
 }

 class HighLevelException extends Exception {
     HighLevelException(Throwable cause) { super(cause); }
 }

 class MidLevelException extends Exception {
     MidLevelException(Throwable cause)  { super(cause); }
 }

 class LowLevelException extends Exception {
 }
 
```
As of release 7, the platform supports the notion of *suppressed exceptions* (in conjunction with the `try`-with-resources statement). Any exceptions that were suppressed in order to deliver an exception are printed out beneath the stack trace. The format of this information depends on the implementation, but the following example may be regarded as typical:

```
 Exception in thread "main" java.lang.Exception: Something happened
  at Foo.bar(Foo.java:10)
  at Foo.main(Foo.java:5)
  Suppressed: Resource$CloseFailException: Resource ID = 0
          at Resource.close(Resource.java:26)
          at Foo.bar(Foo.java:9)
          ... 1 more
 
```
Note that the "... n more" notation is used on suppressed exceptions just at it is used on causes. Unlike causes, suppressed exceptions are indented beyond their "containing exceptions."

An exception can have both a cause and one or more suppressed
exceptions:

```
 Exception in thread "main" java.lang.Exception: Main block
  at Foo3.main(Foo3.java:7)
  Suppressed: Resource$CloseFailException: Resource ID = 2
          at Resource.close(Resource.java:26)
          at Foo3.main(Foo3.java:5)
  Suppressed: Resource$CloseFailException: Resource ID = 1
          at Resource.close(Resource.java:26)
          at Foo3.main(Foo3.java:5)
 Caused by: java.lang.Exception: I did it
  at Foo3.main(Foo3.java:8)
 
```
Likewise, a suppressed exception can have a cause:

```
 Exception in thread "main" java.lang.Exception: Main block
  at Foo4.main(Foo4.java:6)
  Suppressed: Resource2$CloseFailException: Resource ID = 1
          at Resource2.close(Resource2.java:20)
          at Foo4.main(Foo4.java:5)
  Caused by: java.lang.Exception: Rats, you caught me
          at Resource2$CloseFailException.(Resource2.java:45)
          ... 2 more
 
```

<br />

#### public void
**printStackTrace**
([PrintWriter](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/PrintWriter.html) s)

Prints this throwable and its backtrace to the specified
print writer.

##### Parameters

| s | `PrintWriter` to use for output |
|---|---|

#### public void
**printStackTrace**
([PrintStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/PrintStream.html) s)

Prints this throwable and its backtrace to the specified print stream.

##### Parameters

| s | `PrintStream` to use for output |
|---|---|