1.甲骨文Android 11 Java源码侵权案判决结果如何?
2.java并发编程之深入学习Concurrent包(十一,源码ConcurrentLinkedQueue类)
3.ç¨VBå¦ä½åä¸å¹´å?源码
4.国内下载Android11源码 科大源为例
5.小米11开卖前就开源内核代码,有何特别用意?
甲骨文Android 11 Java源码侵权案判决结果如何?
安卓 Java源码侵权案,甲骨文赢得关键胜利 5月日,源码美国上诉法院做出了对甲骨文有利的源码判决,确认甲骨文有权依据版权法保护其Java软件。源码微软 系统 源码 语言这场备受软件行业瞩目的源码知识产权大战中,甲骨文指控谷歌在未获授权的源码情况下在Android系统中使用了Java代码。上诉法院在长达页的源码裁决书中明确指出,甲骨文可以就谷歌对Java的源码使用主张版权,涉及的源码争议焦点是平台API是否受版权法保护。此前,源码旧金山地区法官威廉阿尔苏普曾认为这一情况不受版权保护,源码但上诉法院要求重审此问题。源码 甲骨文指控谷歌在Android系统开发中抄袭了超过个Java API以及行Java源代码,源码这些内容根据版权法均受到法律保护。2020挖矿源码尽管甲骨文在Java专利权诉讼中未能获胜,但此次版权胜利为他们提供了新的法律依据。此次判决中,甲骨文总法律顾问多里安戴利表达了对判决的欢迎,而谷歌则对判决表示失望。这场案件中,包括甲骨文CEO拉里·埃里森、谷歌CEO拉里·佩奇以及前Sun CEO斯科特·麦克尼利和乔纳桑·施瓦茨在内的业界重量级人物均在下级法院的庭审中出庭作证。java并发编程之深入学习Concurrent包(十一,ConcurrentLinkedQueue类)
深入学习ConcurrentLinkedQueue类,了解它作为非阻塞队列实现,采用链表形式构建的容器。
ConcurrentLinkedQueue类遵循非阻塞算法,通过原子指令CAS(Compare and Swap)取代同步阻塞锁,以确保在并发访问下数据的超级新至尊源码一致性,并显著提升同步性能。根据Amdahl定律,最小化串行代码的粒度是提升并发性能的关键,ConcurrentLinkedQueue类的实现正是如此。它不严格保证链表头尾的一致性,而是通过CAS操作来确保新节点的插入和头尾节点的更新,实现高效并发。
在非阻塞队列的操作中,通常需要原子化执行的两个步骤被分离,即插入新节点的入队和出队操作,与头尾节点的更新并非同步。这减少了需要原子更新的值范围,仅涉及唯一的变量,从而提升了非阻塞队列操作的性能,这也是监督 执纪 oa源码Amdahl定律的体现。
ConcurrentLinkedQueue类的源代码中,节点类Node实现了这一设计,其item和next域被声明为普通的volatile类型,并使用AtomicReferenceFieldUpdater来更新。通过这种方式,能够实现高效、并发的节点操作。
节点类型被分为有效节点(item不为null)、无效节点(item为null)和已删除节点(通过next链接到自身),其中,头节点是队列中的第一个有效节点,而尾节点是next为null的节点,注意这不一定是tail指向的节点。
队列的初始化通过创建一个head和tail共同指向,item及next都为null的foc控制源码讲解初始队列来实现。
入队操作涉及将新节点插入到尾节点的后面,通过tail找到尾节点执行插入操作。如果插入不成功,会继续向后推进查找。这一过程确保了高效并发的实现。
出队操作则涉及从头节点开始,循环查找下一个节点,直到找到满足条件的节点为止。一旦找到满足条件的节点,则更新头节点,并返回该节点的item值。
当遍历过程已越过一个节点时,会寻找下一个节点。如果head的next等于head,则意味着到达了哨兵节点,此时下一节点从head重新开始查找。
综上所述,ConcurrentLinkedQueue类通过非阻塞算法和高效的设计,提供了一个高性能的并发队列实现,适用于需要高并发访问场景的应用。
ç¨VBå¦ä½åä¸å¹´å?
ç»ä½ 个ååçVBæºç .
curTime = MaskEdBox1
'ææå
WeekName(0) = " * "
WeekName(1) = "æææ¥"
WeekName(2) = "ææä¸"
WeekName(3) = "ææäº"
WeekName(4) = "ææä¸"
WeekName(5) = "ææå"
WeekName(6) = "ææäº"
WeekName(7) = "ææå "
'天干å称
TianGan(0) = "ç²"
TianGan(1) = "ä¹"
TianGan(2) = "ä¸"
TianGan(3) = "ä¸"
TianGan(4) = "æ"
TianGan(5) = "å·±"
TianGan(6) = "åº"
TianGan(7) = "è¾"
TianGan(8) = "壬"
TianGan(9) = "ç¸"
'å°æ¯å称
DiZhi(0) = "å"
DiZhi(1) = "ä¸"
DiZhi(2) = "å¯ "
DiZhi(3) = "å¯"
DiZhi(4) = "è¾°"
DiZhi(5) = "å·³"
DiZhi(6) = "å"
DiZhi(7) = "æª"
DiZhi(8) = "ç³"
DiZhi(9) = "é "
DiZhi() = "æ"
DiZhi() = "亥"
'å±ç¸å称
ShuXiang(0) = "é¼ "
ShuXiang(1) = "ç"
ShuXiang(2) = "è"
ShuXiang(3) = "å "
ShuXiang(4) = "é¾"
ShuXiang(5) = "è"
ShuXiang(6) = "马"
ShuXiang(7) = "ç¾"
ShuXiang(8) = "ç´"
ShuXiang(9) = "鸡"
ShuXiang() = "ç"
ShuXiang() = "çª"
'ååæ¥æå
DayName(0) = "*"
DayName(1) = "åä¸"
DayName(2) = "åäº"
DayName(3) = "åä¸"
DayName(4) = "åå"
DayName(5) = "åäº"
DayName(6) = "åå "
DayName(7) = "åä¸"
DayName(8) = "åå «"
DayName(9) = "åä¹"
DayName() = "åå"
DayName() = "åä¸"
DayName() = "åäº"
DayName() = "åä¸"
DayName() = "åå"
DayName() = "åäº"
DayName() = "åå "
DayName() = "åä¸"
DayName() = "åå «"
DayName() = "åä¹"
DayName() = "äºå"
DayName() = "廿ä¸"
DayName() = "廿äº"
DayName() = "廿ä¸"
DayName() = "廿å"
DayName() = "廿äº"
DayName() = "廿å "
DayName() = "廿ä¸"
DayName() = "å»¿å «"
DayName() = "廿ä¹"
DayName() = "ä¸å"
'ååæ份å
MonName(0) = "*"
MonName(1) = "æ£"
MonName(2) = "äº"
MonName(3) = "ä¸"
MonName(4) = "å"
MonName(5) = "äº"
MonName(6) = "å "
MonName(7) = "ä¸"
MonName(8) = "å «"
MonName(9) = "ä¹"
MonName() = "å"
MonName() = "åä¸"
MonName() = "è "
'å ¬åæ¯æåé¢ç天æ°
MonthAdd(0) = 0
MonthAdd(1) =
MonthAdd(2) =
MonthAdd(3) =
MonthAdd(4) =
MonthAdd(5) =
MonthAdd(6) =
MonthAdd(7) =
MonthAdd(8) =
MonthAdd(9) =
MonthAdd() =
MonthAdd() =
'ååæ°æ®
NongliData(0) =
NongliData(1) =
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'çæå½åå ¬åå¹´ãæãæ¥ ==> GongliStr
curYear = Year(curTime)
curMonth = Month(curTime)
curDay = Day(curTime)
GongliStr = curYear & "å¹´"
If curMonth < Then
GongliStr = GongliStr & "0" & curMonth & "æ"
Else
GongliStr = GongliStr & curMonth & "æ"
End If
If curDay < Then
GongliStr = GongliStr & "0" & curDay & "æ¥"
Else
GongliStr = GongliStr & curDay & "æ¥"
End If
'çæå½åå ¬åææ ==> WeekdayStr
curWeekday = Weekday(curTime)
WeekdayStr = WeekName(curWeekday)
'计ç®å°åå§æ¶é´å¹´2æ8æ¥ç天æ°ï¼-2-8(æ£æåä¸)
TheDate = (curYear - ) * + Int((curYear - ) / 4) + curDay + MonthAdd(curMonth - 1) -
If curYear Mod 4 = 0 And curMonth > 2 Then
TheDate = TheDate + 1
End If
'计ç®åå天干ãå°æ¯ãæãæ¥
isEnd = 0
m = 0
Do
If NongliData(m) < Then
k =
Else
k =
End If
n = k
Do
If n < 0 Then
Exit Do
End If
'è·åNongliData(m)ç第n个äºè¿å¶ä½çå¼
bit = NongliData(m)
For i = 1 To n Step 1
bit = Int(bit / 2)
Next
bit = bit Mod 2
If TheDate <= + bit Then
isEnd = 1
Exit Do
End If
TheDate = TheDate - - bit
n = n - 1
Loop
If isEnd = 1 Then
Exit Do
End If
m = m + 1
Loop
curYear = + m
curMonth = k - n + 1
curDay = TheDate
If k = Then
If curMonth = (Int(NongliData(m) / ) + 1) Then
curMonth = 1 - curMonth
ElseIf curMonth > Int(NongliData(m) / ) + 1 Then
curMonth = curMonth - 1
End If
End If
'çæåå天干ãå°æ¯ãå±ç¸ ==> NongliStr
NongliStr = "åå" & TianGan(((curYear - 4) Mod ) Mod ) & DiZhi(((curYear - 4) Mod ) Mod ) & "å¹´"
NongliStr = NongliStr & "(" & ShuXiang(((curYear - 4) Mod ) Mod ) & ")"
'çæååæãæ¥ ==> NongliDayStr
If curMonth < 1 Then
NongliDayStr = "é°" & MonName(-1 * curMonth)
Else
NongliDayStr = MonName(curMonth)
End If
NongliDayStr = NongliDayStr & "æ"
NongliDayStr = NongliDayStr & DayName(curDay)
Label2 = NongliStr & NongliDayStr
国内下载Android源码 科大源为例
为了下载并获取Android源码,以科大源为例,首先在Ubuntu系统中安装repo工具。
通过执行命令:
sudo apt install repo
可以完成repo工具的安装。接着,找到并进入repo程序所在目录,使用文本编辑器如gedit修改repo文件。
命令行操作如下:
cd /usr/bin
sudo gedit repo
在repo文件中,将下载源码的地址REPO_URL替换为科大源的链接。
将REPO_URL修改为:git-repo - Git at Google
之后,进入下载源码的目录,执行初始化repo命令,同时指定安卓的build号。
命令行操作如下:
cd aosp
repo init -u git:// mirrors.ustc.edu.cn/aos... -b android-.0.0_r
完成初始化后,执行同步命令以下载完整的源码。
执行repo sync命令。
在获取源码之前,了解安卓build号的方法是搜索关键词:android build-numbers,在官方文档中查找代号、标记和build号的对应关系。
最后,获取所需build号,以便在下载源码时指定正确的参数。
小米开卖前就开源内核代码,有何特别用意?
小米发布即开源新动向:速度惊人
小米甫一发布,即展现出与众不同的开源策略,官方在新品发布的同时就迅速公开了其内核代码,这种前所未有的开源速度无疑引人注目。 小米搭载6.英寸AMOLED四曲面柔性屏,分辨率为x,Hz的刷新率和高达nit的峰值亮度,为用户带来极致的视觉体验。手机尺寸为.3x.6x8.mm(玻璃版)/8.mm(素皮版),重量分别为g(玻璃版)/g(素皮版),并提供卡其、烟紫、Special(雷军签名)、黑、白、蓝六种时尚色彩。 在配置方面,小米搭载骁龙芯片,支持双模5G,内置毫安时电池,配以W有线闪充、W无线闪充及W无线反充,运行基于Android深度定制的MIUI.5,WiFi6、蓝牙5.2、全功能NFC等功能一应俱全,满足现代用户对高速网络和便捷生活的追求。 拍照是小米的一大亮点,后置1亿像素超清主摄加万像素超广角和万像素长焦微距,支持AI魔法分身等先进功能,前置万像素镜头,视频拍摄同样强大,支持视频滤镜、美颜和**模式等特性。 售价方面,小米提供8+GB、8+GB和+GB三种存储配置,定价分别为元、元和元,展现出了小米对于性能与性价比的坚持。 请确保在未经授权的情况下,不要对上述内容进行复制和转发。