程序包 java.lang

类 ClassNotFoundException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.ReflectiveOperationException

java.lang.ClassNotFoundException

所有已实现的接口:

Serializable

public class ClassNotFoundException
extends ReflectiveOperationException

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."

从以下版本开始:

JDK1.0

另请参阅:

Class.forName(java.lang.String), ClassLoader.findSystemClass(java.lang.String), ClassLoader.loadClass(java.lang.String, boolean), 序列化表格

构造器概要

构造器

构造器	说明
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.

方法概要

限定符和类型	方法	说明
Throwable	getCause()	Returns the cause of this exception (the exception that was raised if an error occurred while attempting to load the class; otherwise null).
Throwable	getException()	Returns the exception that was raised if an error occurred while attempting to load the class.

从类继承的方法 java.lang.Object

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

从类继承的方法 java.lang.Throwable

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

构造器详细资料

ClassNotFoundException

public ClassNotFoundException()

Constructs a ClassNotFoundException with no detail message.

ClassNotFoundException

public ClassNotFoundException(String s)

Constructs a ClassNotFoundException with the specified detail message.

参数:

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.

参数:

s - the detail message

ex - the exception that was raised while loading the class

从以下版本开始:

1.2

方法详细资料

getException

public Throwable getException()

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.

返回:

the Exception that was raised while loading a class

从以下版本开始:

1.2

getCause

public Throwable getCause()

Returns the cause of this exception (the exception that was raised if an error occurred while attempting to load the class; otherwise null).

覆盖:

getCause 在类中 Throwable

返回:

the cause of this exception.

从以下版本开始:

1.4