org.jfree.util

Class StackableException

java.lang.Object

java.lang.Throwable

java.lang.Exception

org.jfree.util.StackableException

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ModuleInitializeException, ObjectDescriptionException, ObjectFactoryException

public abstract class StackableException
extends Exception

A baseclass for exceptions, which could have parent exceptions. These parent exceptions are raised in a subclass and are now wrapped into a subclass of this Exception.

The parents are printed when this exception is printed. This class exists mainly for debugging reasons, as with them it is easier to detect the root cause of an error.

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
StackableException() Creates a StackableRuntimeException with no message and no parent.
StackableException(String message) Creates an exception.
StackableException(String message, Exception ex) Creates an exception.

Method Summary

Methods

Modifier and Type	Method and Description
Exception	getParent() Returns the parent exception (possibly null).
void	printStackTrace() Prints this Throwable and its backtrace to the standard error stream.
void	printStackTrace(PrintStream stream) Prints the stack trace to the specified stream.
void	printStackTrace(PrintWriter writer) Prints the stack trace to the specified writer.

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

StackableException

public StackableException()

Creates a StackableRuntimeException with no message and no parent.

StackableException

public StackableException(String message,
                  Exception ex)

Creates an exception.

Parameters:

message - the exception message.

ex - the parent exception.

StackableException

public StackableException(String message)

Creates an exception.

Parameters:

message - the exception message.

Method Detail

getParent

public Exception getParent()

Returns the parent exception (possibly null).

Returns:

the parent exception.

printStackTrace

public void printStackTrace(PrintStream stream)

Prints the stack trace to the specified stream.

Overrides:

printStackTrace in class Throwable

Parameters:

stream - the output stream.

printStackTrace

public void printStackTrace(PrintWriter writer)

Prints the stack trace to the specified writer.

Overrides:

printStackTrace in class Throwable

Parameters:

writer - the writer.

printStackTrace

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 Throwable.toString() method for this object. Remaining lines represent data previously recorded by the method Throwable.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[] argv) {
         crunch(null);
     }
     static void crunch(int[] a) {
         mash(a);
     }

     static void mash(int[] b) {
         System.out.println(b[0]);
     }
 }
 

Overrides:

printStackTrace in class Throwable

See Also:

System.err