CompletionException (Java SE 11 & JDK 11 )

java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - java.lang.RuntimeException
    - - java.util.concurrent.CompletionException

All Implemented Interfaces:

Serializable
```
public class CompletionException
extends RuntimeException
```
Exception thrown when an error or other exception is encountered in the course of completing a result or task.

Since:

1.8

See Also:

Serialized Form

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`CompletionException()`	Constructs a `CompletionException` with no detail message.
`protected`	`CompletionException(String message)`	Constructs a `CompletionException` with the specified detail message.
	`CompletionException(String message, Throwable cause)`	Constructs a `CompletionException` with the specified detail message and cause.
	`CompletionException(Throwable cause)`	Constructs a `CompletionException` with the specified cause.

Method Summary
- Methods declared in class java.lang.Throwable
  addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, 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
  - CompletionException
```
protected CompletionException()
```
    Constructs a CompletionException with no detail message. The cause is not initialized, and may subsequently be initialized by a call to initCause.
  - CompletionException
```
protected CompletionException(String message)
```
    Constructs a CompletionException with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to initCause.
    
    Parameters:
    
    message - the detail message
  - CompletionException
```
public CompletionException(String message,
                           Throwable cause)
```
    Constructs a CompletionException with the specified detail message and cause.
    
    Parameters:
    
    message - the detail message
    
    cause - the cause (which is saved for later retrieval by the Throwable.getCause() method)
  - CompletionException
```
public CompletionException(Throwable cause)
```
    Constructs a CompletionException with the specified cause. The detail message is set to (cause == null ? null : cause.toString()) (which typically contains the class and detail message of cause).
    
    Parameters:
    
    cause - the cause (which is saved for later retrieval by the Throwable.getCause() method)