java.lang: public class: ClassNotFoundException

java.lang
public class: ClassNotFoundException [javadoc | source]

java.lang.Object
   java.lang.Throwable
      java.lang.Exception
         java.lang.ReflectiveOperationException
            java.lang.ClassNotFoundException

All Implemented Interfaces:
Serializable

Direct Known Subclasses:

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

The forName method in class Class.
The findSystemClass method in class ClassLoader .
The loadClass method in class ClassLoader.

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

As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism. The "optional exception that was raised while loading the class" that may be provided at construction time and accessed via the #getException() method is now known as the cause, and may be accessed via the Throwable#getCause() method, as well as the aforementioned "legacy method."

Also see:

java.lang.Class#forName(java.lang.String)

java.lang.ClassLoader#findSystemClass(java.lang.String)

java.lang.ClassLoader#loadClass(java.lang.String, boolean)

author: unascribed -

since: JDK1.0 -

Fields inherited from java.lang.ReflectiveOperationException:
serialVersionUID

Fields inherited from java.lang.Exception:
serialVersionUID

Constructor:

Constructor:
public ClassNotFoundException() { super((Throwable)null); // Disallow initCause } Constructs a `ClassNotFoundException` with no detail message.
public ClassNotFoundException(String s) { super(s, null); // Disallow initCause } Constructs a `ClassNotFoundException` with the specified detail message. Parameters: `s` - the detail message.
public ClassNotFoundException(String s, Throwable ex) { super(s, null); // Disallow initCause this.ex = 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` -

 public ClassNotFoundException() {
        super((Throwable)null);  // Disallow initCause
}

Constructs a ClassNotFoundException with no detail message.

 public ClassNotFoundException(String s) {
        super(s, null);  //  Disallow initCause
}

ClassNotFoundException

Parameters:

s - the detail message.

 public ClassNotFoundException(String s,
    Throwable ex) {
        super(s, null);  //  Disallow initCause
        this.ex = ex;
}

ClassNotFoundException

Parameters:

s - the detail message

ex - the exception that was raised while loading the class

since: 1.2 -

Method from java.lang.ClassNotFoundException Summary:
getCause, getException

Methods from java.lang.Throwable:
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getStackTraceDepth, getStackTraceElement, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from java.lang.ClassNotFoundException Detail:
public Throwable getCause() { return ex; } Returns the cause of this exception (the exception that was raised if an error occurred while attempting to load the class; otherwise `null`).
public Throwable getException() { return ex; } Returns the exception that was raised if an error occurred while attempting to load the class. Otherwise, returns `null`. This method predates the general-purpose exception chaining facility. The Throwable#getCause() method is now the preferred means of obtaining this information.

Method from java.lang.ClassNotFoundException Detail:

 public Throwable getCause() {
        return ex;
}

null

 public Throwable getException() {
        return ex;
}

null

This method predates the general-purpose exception chaining facility. The Throwable#getCause() method is now the preferred means of obtaining this information.