DO NOT TRANSLATE OR LOCALIZE.
-----------------------------
%% This notice is provided with respect to ASM Bytecode Manipulation
Framework v5.0.3, which may be included with JRE 8, and JDK 8, and
OpenJDK 8.
--- begin of LICENSE ---
Copyright (c) 2000-2011 France Télécom
All rights reserved.
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2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holders nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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--- end of LICENSE ---
--------------------------------------------------------------------------------
%% This notice is provided with respect to BSDiff v4.3, which may be
included with JRE 8, JDK 8, and OpenJDK 8.
--- begin of LICENSE ---
Copyright 2003-2005 Colin Percival
All rights reserved
Redistribution and use in source and binary forms, with or without
modification, are permitted providing that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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--- end of LICENSE ---
-------------------------------------------------------------------------------
%% This notice is provided with respect to CodeViewer 1.0, which may be
included with JDK 8.
--- begin of LICENSE ---
Copyright 1999 by CoolServlets.com.
Any errors or suggested improvements to this class can be reported as
instructed on CoolServlets.com. We hope you enjoy this program... your
comments will encourage further development! This software is distributed
under the terms of the BSD License. Redistribution and use in source and
binary forms, with or without modification, are permitted provided that the
following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
Neither name of CoolServlets.com nor the names of its contributors may be
used to endorse or promote products derived from this software without
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THIS SOFTWARE IS PROVIDED BY COOLSERVLETS.COM AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
--- end of LICENSE ---
-------------------------------------------------------------------------------
%% This notice is provided with respect to Cryptix AES 3.2.0, which may be
included with JRE 8, JDK 8, and OpenJDK 8.
--- begin of LICENSE ---
Cryptix General License
Copyright (c) 1995-2005 The Cryptix Foundation Limited.
All rights reserved.
Redistribution and use in source and binary forms, with or without
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--- end of LICENSE ---
-------------------------------------------------------------------------------
%% This notice is provided with respect to CUP Parser Generator for
Java 0.10k, which may be included with JRE 8, JDK 8, and OpenJDK 8.
--- begin of LICENSE ---
Copyright 1996-1999 by Scott Hudson, Frank Flannery, C. Scott Ananian
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, provided
that the above copyright notice appear in all copies and that both the
copyright notice and this permission notice and warranty disclaimer appear in
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employers not be used in advertising or publicity pertaining to distribution of
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The authors and their employers disclaim all warranties with regard to
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In no event shall the authors or their employers be liable for any special,
indirect or consequential damages or any damages whatsoever resulting from
loss of use, data or profits, whether in an action of contract, negli
java +jdk1.8
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更新于2023-03-08
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Java JDK 1.8是Java开发工具包的一个重要版本,由Oracle公司发布,适用于Windows操作系统。JDK(Java Development Kit)是开发和运行Java应用程序、网络应用和分布式系统的必备工具。这个版本在Java社区中备受青睐,因为它引入了许多创新功能和优化,极大地提升了开发效率和代码性能。
JDK 1.8中最重要的特性之一是Lambda表达式。这是一种简洁的函数式编程概念,允许开发者用更少的代码实现复杂的操作,特别是处理集合数据时。Lambda表达式简化了匿名类的创建,使得回调函数的定义更加直观,提高了代码的可读性和维护性。
JDK 1.8引入了方法引用来替代传统的匿名内部类。这使得你可以直接引用一个方法而无需创建一个新的类实例,进一步降低了代码复杂性。
Stream API是另一个重大改进。它提供了一种用于处理集合数据的新方式,支持串行和并行操作。通过链式调用如map(), filter()和reduce()等方法,可以方便地对数据进行转换和过滤,使得复杂的数据处理变得简洁高效。
新版本还改进了日期和时间API,引入了java.time包,取代了旧的java.util.Date和java.util.Calendar。新的API更直观,更易于使用,提供了更好的处理时区、日期、时间和持续时间的能力。
另外,JDK 1.8还引入了接口默认方法,允许在接口中定义具有实现的方法,这样可以在不破坏向后兼容性的前提下为接口添加新的功能。
在JDBC方面,JDK 1.8提供了4.1版本,增强了批处理操作,提升了性能,并改进了结果集的处理。
在编译器方面,JDK 1.8的Java编译器(javac)增强了类型推断,使得编译器能更好地理解泛型和lambda表达式,从而生成更高效的字节码。
在JVM层面,JDK 1.8引入了G1垃圾收集器,这是一个强大的全区域垃圾收集器,旨在减少停顿时间并提高整体系统响应性。此外,它还支持String的拼接优化,通过StringBuffer或StringBuilder的内部优化,提高了字符串连接的性能。
在提供的压缩包中,包含了以下文件:
1. COPYRIGHT:Oracle公司的版权信息。
2. README.html:可能包含安装指南和注意事项。
3. LICENSE:JDK的许可协议,详细列明了使用条款。
4. release:版本发布信息,可能包含发行日期和版本号等。
5. THIRDPARTYLICENSEREADME.txt和THIRDPARTYLICENSEREADME-JAVAFX.txt:第三方库的许可信息。
6. src.zip和javafx-src.zip:源代码压缩包,分别包含JDK的核心库和JavaFX的源代码,供开发者参考学习。
7. include:包含头文件,用于C/C++编程时调用Java Native Interface (JNI)。
8. lib:库文件目录,包含运行Java程序所需的库文件。
Java JDK 1.8是一个强大的开发工具,它的特性改进了开发者的生产力,优化了代码质量和性能,同时也为Java程序员带来了更丰富的功能和更高的编程灵活性。无论你是初学者还是经验丰富的开发者,都应该了解并掌握这些关键知识点。
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