Throwable

java.lang.Object
- java.lang.Throwable

All Implemented Interfaces:

Serializable, Modified

Direct Known Subclasses:

Error, Exception
```
public class Throwable
extends Object
implements Serializable, Modified
```
The superclass of all classes which can be thrown by the VM. The two direct subclasses are recoverable exceptions (Exception) and unrecoverable errors (Error). This class provides common methods for accessing a string message which provides extra information about the circumstances in which the Throwable was created (basically an error message in most cases), and for saving a stack trace (that is, a record of the call stack at a particular point in time) which can be printed later.
A Throwable can also include a cause, which is a nested Throwable that represents the original problem that led to this Throwable. It is often used for wrapping various types of errors into a common Throwable without losing the detailed original error information. When printing the stack trace, the trace of the cause is included.

See Also:

Error, Exception, RuntimeException, Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`int`	`addr`	This field contains the machine address where the exception was thrown.
`String`	`message`	This field contains a detailed message depending on the exception actually thrown.

Constructor Summary

Constructors
Constructor	Description
`Throwable()`
`Throwable(String message)`
`Throwable(String message, Throwable cause)`
`Throwable(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace)`
`Throwable(Throwable cause)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getMessage()`
`void`	`printStackTrace()`
`void`	`printStackTrace(PrintStream s)`	Prints the throwable and it's stack trace to a print stream
`String`	`toString()`	Returns a string containing a concise, human-readable description of this object.

Methods inherited from class java.lang.Object
equals, getClass, hashCode

- Field Detail
  - message
```
public String message
```
    This field contains a detailed message depending on the exception actually thrown.
  - addr
```
public int addr
```
    This field contains the machine address where the exception was thrown.
- Constructor Detail
  - Throwable
```
public Throwable()
```
  - Throwable
```
public Throwable(String message)
```
  - Throwable
```
public Throwable(String message,
                 Throwable cause)
```
  - Throwable
```
public Throwable(Throwable cause)
```
  - Throwable
```
public Throwable(String message,
                 Throwable cause,
                 boolean enableSuppression,
                 boolean writableStackTrace)
```
- Method Detail
  - getMessage
```
public String getMessage()
```
  - toString
```
public String toString()
```
    Description copied from class: Object
    
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    a printable representation of this object.
  - printStackTrace
```
public void printStackTrace()
```
  - printStackTrace
```
public void printStackTrace(PrintStream s)
```
    Prints the throwable and it's stack trace to a print stream
    
    Parameters:
    
    s - PrintWriter to stream the data to.