Java 创建抽象类
创建抽象类
实例源码：
源代码：
执行
执行中...
x
1
2
import java.util.*;3
/** from NowJava.com - 时代Java**/4
5
public class AbstractClassTest {6
7
public static void main(String[] args) {8
9
10
//check out the class alien one11
12
AlienCreatureOne aOne = new AlienCreatureOne();13
14
System.out.format("%s%n", aOne.lifeBegins());15
16
System.out.format("%s%n", aOne.live());17
18
System.out.format("%s%n", aOne.lifeEnds());19
20
21
//check out the class alien two22
23
AlienCreatureTwo aTwo = new AlienCreatureTwo();24
25
System.out.format("%s%n", aTwo.lifeBegins());26
27
System.out.format("%s%n", aTwo.live());28
29
System.out.format("%s%n", aTwo.lifeEnds());30
31
}32
33
34
}35
36
abstract class AlienCreature {37
38
// all creaturesd are born// 来自 nowjava.com - 时 代 Java39
40
String lifeBegins() {41
42
String me = "Hello, I'm here.";43
44
return me;45
46
}47
48
49
// creatures live by eating different material..so this is abstract50
51
abstract String live();52
53
54
// all creatures die55
56
String lifeEnds() {57
58
String meEnd = "Oh no, it all ends - bye. ";59
60
return meEnd;61
62
}63
64
}65
66
67
//nonabstract subclass 168
69
class AlienCreatureOne extends AlienCreature {70
71
String live() {72
73
String living = "We alien ones live happily on alien one nutrition.";74
75
return living;76
77
}78
79
}80
81
//nonabstract subclass 282
83
84
class AlienCreatureTwo extends AlienCreature {85
86
String live() {87
88
String living = "We alien twos live happily on alien two nutrition.";89
90
return living;91
92
}93
94
}95
96
/*97
98
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.99
100
*101
102
* Redistribution and use in source and binary forms, with or without103
104
* modification, are permitted provided that the following conditions105
106
* are met:107
108
*109
110
* - Redistributions of source code must retain the above copyright111
112
* notice, this list of conditions and the following disclaimer.113
114
*115
116
* - Redistributions in binary form must reproduce the above copyright117
118
* notice, this list of conditions and the following disclaimer in the119
120
* documentation and/or other materials provided with the distribution.121
122
*123
124
* - Neither the name of Oracle or the names of its125
126
* contributors may be used to endorse or promote products derived127
128
* from this software without specific prior written permission.129
130
*131
132
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS133
134
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,135
136
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR137
138
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR139
/**代码未完, 请加载全部代码(NowJava.com).**/执行结果：
本文系作者在时代Java发表，未经许可，不得转载。如有侵权，请联系nowjava@qq.com删除。
编辑于
关注时代Java