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126 lines
3.5 KiB
126 lines
3.5 KiB
/*
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* Copyright (c) 1995, 2004, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.lang;
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/**
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* Thrown when an application tries to load in a class through its
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* string name using:
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* <ul>
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* <li>The <code>forName</code> method in class <code>Class</code>.
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* <li>The <code>findSystemClass</code> method in class
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* <code>ClassLoader</code> .
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* <li>The <code>loadClass</code> method in class <code>ClassLoader</code>.
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* </ul>
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* <p>
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* but no definition for the class with the specified name could be found.
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*
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* <p>As of release 1.4, this exception has been retrofitted to conform to
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* the general purpose exception-chaining mechanism. The "optional exception
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* that was raised while loading the class" that may be provided at
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* construction time and accessed via the {@link #getException()} method is
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* now known as the <i>cause</i>, and may be accessed via the {@link
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* Throwable#getCause()} method, as well as the aforementioned "legacy method."
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*
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* @author unascribed
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* @see java.lang.Class#forName(java.lang.String)
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* @see java.lang.ClassLoader#findSystemClass(java.lang.String)
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* @see java.lang.ClassLoader#loadClass(java.lang.String, boolean)
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* @since JDK1.0
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*/
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public class ClassNotFoundException extends ReflectiveOperationException {
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/**
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* use serialVersionUID from JDK 1.1.X for interoperability
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*/
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private static final long serialVersionUID = 9176873029745254542L;
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/**
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* This field holds the exception ex if the
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* ClassNotFoundException(String s, Throwable ex) constructor was
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* used to instantiate the object
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* @serial
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* @since 1.2
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*/
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private Throwable ex;
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/**
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* Constructs a <code>ClassNotFoundException</code> with no detail message.
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*/
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public ClassNotFoundException() {
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super((Throwable)null); // Disallow initCause
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}
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/**
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* Constructs a <code>ClassNotFoundException</code> with the
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* specified detail message.
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*
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* @param s the detail message.
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*/
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public ClassNotFoundException(String s) {
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super(s, null); // Disallow initCause
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}
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/**
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* Constructs a <code>ClassNotFoundException</code> with the
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* specified detail message and optional exception that was
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* raised while loading the class.
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*
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* @param s the detail message
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* @param ex the exception that was raised while loading the class
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* @since 1.2
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*/
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public ClassNotFoundException(String s, Throwable ex) {
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super(s, null); // Disallow initCause
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this.ex = ex;
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}
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/**
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* Returns the exception that was raised if an error occurred while
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* attempting to load the class. Otherwise, returns <tt>null</tt>.
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*
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* <p>This method predates the general-purpose exception chaining facility.
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* The {@link Throwable#getCause()} method is now the preferred means of
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* obtaining this information.
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*
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* @return the <code>Exception</code> that was raised while loading a class
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* @since 1.2
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*/
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public Throwable getException() {
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return ex;
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}
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/**
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* Returns the cause of this exception (the exception that was raised
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* if an error occurred while attempting to load the class; otherwise
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* <tt>null</tt>).
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*
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* @return the cause of this exception.
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* @since 1.4
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*/
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public Throwable getCause() {
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return ex;
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}
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}
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