01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package java.lang;
19:
20: /**
21: * This runtime exception is thrown when an attempt is made to access a field or
22: * method of an instance or an element of an array when there is no instance or
23: * array to use (i.e. the pointer is null).
24: */
25: public class NullPointerException extends RuntimeException {
26:
27: private static final long serialVersionUID = 5162710183389028792L;
28:
29: /**
30: * Constructs a new instance of this class with its walkback filled in.
31: */
32: public NullPointerException() {
33: super ();
34: }
35:
36: /**
37: * Constructs a new instance of this class with its walkback and message
38: * filled in.
39: *
40: * @param detailMessage
41: * String The detail message for the exception.
42: */
43: public NullPointerException(String detailMessage) {
44: super(detailMessage);
45: }
46:
47: }
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