JavaTM 2 Platform
Std. Ed. v1.3.1

java.lang
Class ClassNotFoundException

java.lang.Object
  |
  +--java.lang.Throwable
        |
        +--java.lang.Exception
              |
              +--java.lang.ClassNotFoundException
All Implemented Interfaces:
Serializable

public class ClassNotFoundException
extends Exception

Thrown when an application tries to load in a class through its string name using:

but no definition for the class with the specifed name could be found.

Since:
JDK1.0
See Also:
Class.forName(java.lang.String), ClassLoader.findSystemClass(java.lang.String), ClassLoader.loadClass(java.lang.String, boolean), Serialized Form

Constructor Summary
ClassNotFoundException()
          Constructs a ClassNotFoundException with no detail message.
ClassNotFoundException(String s)
          Constructs a ClassNotFoundException with the specified detail message.
ClassNotFoundException(String s, Throwable ex)
          Constructs a ClassNotFoundException with the specified detail message and optional exception that was raised while loading the class.
 
Method Summary
 Throwable getException()
          Returns the exception that was raised if an error occurred while attempting to load the class.
 void printStackTrace()
          Prints the stack backtrace.
 void printStackTrace(PrintStream ps)
          Prints the stack backtrace to the specified print stream.
 void printStackTrace(PrintWriter pw)
          Prints the stack backtrace to the specified print writer.
 
Methods inherited from class java.lang.Throwable
fillInStackTrace, getLocalizedMessage, getMessage, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ClassNotFoundException

public ClassNotFoundException()
Constructs a ClassNotFoundException with no detail message.

ClassNotFoundException

public ClassNotFoundException(String s)
Constructs a ClassNotFoundException with the specified detail message.
Parameters:
s - the detail message.

ClassNotFoundException

public ClassNotFoundException(String s,
                              Throwable ex)
Constructs a ClassNotFoundException with the specified detail message and optional exception that was raised while loading the class.
Parameters:
s - the detail message
ex - the exception that was raised while loading the class
Since:
1.2
Method Detail

getException

public Throwable getException()
Returns the exception that was raised if an error occurred while attempting to load the class. Otherwise, returns null.
Returns:
the Exception that was raised while loading a class
Since:
1.2

printStackTrace

public void printStackTrace()
Prints the stack backtrace. If an exception occurred during class loading it prints that exception's stack trace, or else prints the stack backtrace of this exception.
Overrides:
printStackTrace in class Throwable
See Also:
System.err

printStackTrace

public void printStackTrace(PrintStream ps)
Prints the stack backtrace to the specified print stream. If an exception occurred during class loading it prints that exception's stack trace, or else prints the stack backtrace of this exception.
Overrides:
printStackTrace in class Throwable
Following copied from class: java.lang.Throwable
Parameters:
s - PrintStream to use for output

printStackTrace

public void printStackTrace(PrintWriter pw)
Prints the stack backtrace to the specified print writer. If an exception occurred during class loading it prints that exception's stack trace, or else prints the stack backtrace of this exception.
Overrides:
printStackTrace in class Throwable
Following copied from class: java.lang.Throwable
Parameters:
s - PrintWriter to use for output

JavaTM 2 Platform
Std. Ed. v1.3.1

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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