Class ClassNotLoadedException

java.lang.Object

java.lang.Throwable

java.lang.Exception

com.sun.jdi.ClassNotLoadedException

All Implemented Interfaces:

Serializable

public class ClassNotLoadedException
extends Exception

Thrown to indicate that the requested class has not yet been loaded through the appropriate class loader.

Due to the lazy class linking performed by many VMs, it is possible for a field or variable to be visible in a program before the associated class is loaded. Until the class is loaded all that is available is a signature string. If an attempt is made to set the value of such a field or variable from JDI, the appropriate type checking cannot be done because the destination class has not been loaded. The same is true for the element class of array elements.

It is not advisable to solve this problem by attempting a class load on the fly in this case. There are two problems in having the debugger load a class instead of waiting for it to load over the normal course of events.

• There can be no guarantee that running the appropriate class loader won't cause a deadlock in loading the class. Class loaders can consist of arbitrary Java programming language code and the class loading methods are usually synchronized. Most of the work done by a debugger happens when threads are suspended. If another application thread is suspended within the same class loader, a deadlock is very possible.
• Changing the order in which classes are normally loaded may either mask or reveal bugs in the application. An unintrusive debugger should strive to leave unchanged the behavior of the application being debugged.

To avoid these potential problems, this exception is thrown.

Note that this exception will be thrown until the class in question is visible to the class loader of enclosing class. (That is, the class loader of the enclosing class must be an initiating class loader for the class in question.) See The Java Virtual Machine Specification for more details.

Since:

1.3

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ClassNotLoadedException(String className)
ClassNotLoadedException(String className, String message)

Method Summary

Modifier and Type	Method	Description
String	className()

Methods declared in class Throwable

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

Modifier and Type	Method	Description
final void	addSuppressed(Throwable exception)	Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.
Throwable	fillInStackTrace()	Fills in the execution stack trace.
Throwable	getCause()	Returns the cause of this throwable or null if the cause is nonexistent or unknown.
String	getLocalizedMessage()	Creates a localized description of this throwable.
String	getMessage()	Returns the detail message string of this throwable.
StackTraceElement[]	getStackTrace()	Provides programmatic access to the stack trace information printed by Throwable.printStackTrace().
final Throwable[]	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.
Throwable	initCause(Throwable cause)	Initializes the cause of this throwable to the specified value.
void	printStackTrace()	Prints this throwable and its backtrace to the standard error stream.
void	printStackTrace(PrintStream s)	Prints this throwable and its backtrace to the specified print stream.
void	printStackTrace(PrintWriter s)	Prints this throwable and its backtrace to the specified print writer.
void	setStackTrace(StackTraceElement[] stackTrace)	Sets the stack trace elements that will be returned by Throwable.getStackTrace() and printed by Throwable.printStackTrace() and related methods.
String	toString()	Returns a short description of this throwable.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

ClassNotLoadedException

public ClassNotLoadedException(String className)

ClassNotLoadedException

public ClassNotLoadedException(String className,
 String message)

Method Details

className

public String className()