京东自营 618 + 国补 iPhone 历史最低价
Java 取消装箱int和double值
取消装箱int和double值
实例源码：
源代码：
执行
执行中...
x
1
2
import java.util.ArrayList;3
4
import java.util.List;5
6
7
public class Unboxing {/*from n o w j a v a . c o m - 时 代 Java*/8
9
10
public static void main(String[] args) {11
12
13
Integer i = new Integer(-8);14
15
16
// 1. Unboxing through method invocation17
18
int absVal = absoluteValue(i);19
20
System.out.println("absolute value of " + i + " = " + absVal);21
22
23
List<Double> ld = new ArrayList<>();24
25
ld.add(3.1416); // PI is autoboxed through method invocation.26
/**27
n o w j a v a . c o m28
**/29
30
31
// 2. Unboxing through assignment32
33
double phi = ld.get(0);34
35
System.out.println("phi = " + phi);36
37
}38
39
40
public static int absoluteValue(int i) {41
42
return (i < 0) ? -i : i;43
44
}45
46
}47
48
49
/*50
51
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.52
53
*54
55
* Redistribution and use in source and binary forms, with or without56
57
* modification, are permitted provided that the following conditions58
59
* are met:60
61
*62
63
* - Redistributions of source code must retain the above copyright64
65
* notice, this list of conditions and the following disclaimer.66
67
*68
69
* - Redistributions in binary form must reproduce the above copyright70
71
* notice, this list of conditions and the following disclaimer in the72
73
* documentation and/or other materials provided with the distribution.74
75
*76
77
* - Neither the name of Oracle or the names of its78
79
* contributors may be used to endorse or promote products derived80
81
* from this software without specific prior written permission.82
83
*84
85
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS86
87
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,88
89
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR90
91
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR92
93
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,94
95
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,96
/**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