1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24  */
25 
26 package java.lang;
27 
28 /**
29  * An {@code Error} is a subclass of {@code Throwable}
30  * that indicates serious problems that a reasonable application
31  * should not try to catch. Most such errors are abnormal conditions.
32  * The {@code ThreadDeath} error, though a "normal" condition,
33  * is also a subclass of {@code Error} because most applications
34  * should not try to catch it.
35  * <p>
36  * A method is not required to declare in its {@code throws}
37  * clause any subclasses of {@code Error} that might be thrown
38  * during the execution of the method but not caught, since these
39  * errors are abnormal conditions that should never occur.
40  *
41  * That is, {@code Error} and its subclasses are regarded as unchecked
42  * exceptions for the purposes of compile-time checking of exceptions.
43  *
44  * @author  Frank Yellin
45  * @see     java.lang.ThreadDeath
46  * @jls 11.2 Compile-Time Checking of Exceptions
47  * @since   JDK1.0
48  */
49 public class Error extends Throwable {
50     static final long serialVersionUID = 4980196508277280342L;
51 
52     /**
53      * Constructs a new error with {@code null} as its detail message.
54      * The cause is not initialized, and may subsequently be initialized by a
55      * call to {@link #initCause}.
56      */
Error()57     public Error() {
58         super();
59     }
60 
61     /**
62      * Constructs a new error with the specified detail message.  The
63      * cause is not initialized, and may subsequently be initialized by
64      * a call to {@link #initCause}.
65      *
66      * @param   message   the detail message. The detail message is saved for
67      *          later retrieval by the {@link #getMessage()} method.
68      */
Error(String message)69     public Error(String message) {
70         super(message);
71     }
72 
73     /**
74      * Constructs a new error with the specified detail message and
75      * cause.  <p>Note that the detail message associated with
76      * {@code cause} is <i>not</i> automatically incorporated in
77      * this error's detail message.
78      *
79      * @param  message the detail message (which is saved for later retrieval
80      *         by the {@link #getMessage()} method).
81      * @param  cause the cause (which is saved for later retrieval by the
82      *         {@link #getCause()} method).  (A {@code null} value is
83      *         permitted, and indicates that the cause is nonexistent or
84      *         unknown.)
85      * @since  1.4
86      */
Error(String message, Throwable cause)87     public Error(String message, Throwable cause) {
88         super(message, cause);
89     }
90 
91     /**
92      * Constructs a new error with the specified cause and a detail
93      * message of {@code (cause==null ? null : cause.toString())} (which
94      * typically contains the class and detail message of {@code cause}).
95      * This constructor is useful for errors that are little more than
96      * wrappers for other throwables.
97      *
98      * @param  cause the cause (which is saved for later retrieval by the
99      *         {@link #getCause()} method).  (A {@code null} value is
100      *         permitted, and indicates that the cause is nonexistent or
101      *         unknown.)
102      * @since  1.4
103      */
Error(Throwable cause)104     public Error(Throwable cause) {
105         super(cause);
106     }
107 
108     /**
109      * Constructs a new error with the specified detail message,
110      * cause, suppression enabled or disabled, and writable stack
111      * trace enabled or disabled.
112      *
113      * @param  message the detail message.
114      * @param cause the cause.  (A {@code null} value is permitted,
115      * and indicates that the cause is nonexistent or unknown.)
116      * @param enableSuppression whether or not suppression is enabled
117      *                          or disabled
118      * @param writableStackTrace whether or not the stack trace should
119      *                           be writable
120      *
121      * @since 1.7
122      */
Error(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace)123     protected Error(String message, Throwable cause,
124                     boolean enableSuppression,
125                     boolean writableStackTrace) {
126         super(message, cause, enableSuppression, writableStackTrace);
127     }
128 }
129