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  /*
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   * Copyright (c) 1994, 2011, Oracle and/or its affiliates. All rights reserved.
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   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   *
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   * This code is free software; you can redistribute it and/or modify it
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   * under the terms of the GNU General Public License version 2 only, as
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   * published by the Free Software Foundation.  Oracle designates this
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   * particular file as subject to the "Classpath" exception as provided
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   * by Oracle in the LICENSE file that accompanied this code.
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  *
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  * This code is distributed in the hope that it will be useful, but WITHOUT
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  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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  * version 2 for more details (a copy is included in the LICENSE file that
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  * accompanied this code).
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  *
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  * You should have received a copy of the GNU General Public License version
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  * 2 along with this work; if not, write to the Free Software Foundation,
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  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  *
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  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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  * or visit www.oracle.com if you need additional information or have any
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  * questions.
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  */
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 package java.lang;

The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.

The class Exception and any subclasses that are not also subclasses of RuntimeException are checked exceptions. Checked exceptions need to be declared in a method or constructor's throws clause if they can be thrown by the execution of the method or constructor and propagate outside the method or constructor boundary.

Author(s):
Frank Yellin
Since:
JDK1.0
See also:
Error
Jls:
11.2 Compile-Time Checking of Exceptions
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 public class Exception extends Throwable {
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     static final long serialVersionUID = -3387516993124229948L;

    
Constructs a new exception with null as its detail message. The cause is not initialized, and may subsequently be initialized by a call to Throwable.initCause(java.lang.Throwable). 
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     public Exception() {
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         super();
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     }

    
Constructs a new exception with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to Throwable.initCause(java.lang.Throwable).

Parameters:
message the detail message. The detail message is saved for later retrieval by the Throwable.getMessage() method.
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     public Exception(String message) {
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         super(message);
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     }

    
Constructs a new exception with the specified detail message and cause.

Note that the detail message associated with cause is not automatically incorporated in this exception's detail message.

Parameters:
message the detail message (which is saved for later retrieval by the Throwable.getMessage() method).
cause the cause (which is saved for later retrieval by the Throwable.getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)
Since:
1.4
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     public Exception(String message, Throwable cause) {
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         super(message, cause);
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     }

    
Constructs a new exception with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause). This constructor is useful for exceptions that are little more than wrappers for other throwables (for example, java.security.PrivilegedActionException).

Parameters:
cause the cause (which is saved for later retrieval by the Throwable.getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)
Since:
1.4
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    public Exception(Throwable cause) {
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        super(cause);
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    }

    
Constructs a new exception with the specified detail message, cause, suppression enabled or disabled, and writable stack trace enabled or disabled.

Parameters:
message the detail message.
cause the cause. (A null value is permitted, and indicates that the cause is nonexistent or unknown.)
enableSuppression whether or not suppression is enabled or disabled
writableStackTrace whether or not the stack trace should be writable
Since:
1.7
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    protected Exception(String message, Throwable cause,
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                        boolean enableSuppression,
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                        boolean writableStackTrace) {
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        super(message, cause, enableSuppression, writableStackTrace);
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    }
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