Java开发工具箱-JDK的安装与配置
Java开发工具箱-JDK的安装与配置一、JDK、JRE
术语名缩写解释
Java Development KitJDKJava程序员用的工具包
Java Runtime EnviromentJREJava程序的运行环境
二、下载、安装JDK 官网下载链接:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html 百度网盘下载链接(64位)：http://pan.baidu.com/s/1bLnANG 百度网盘下载链接(32位):http://pan.baidu.com/s/1skLzcHB https://images2015.cnblogs.com/blog/940373/201701/940373-20170114115941791-1857235472.png鼠标左键双击运行.exe,将会弹出引导程序安装JDK和JRE,https://images2015.cnblogs.com/blog/940373/201701/940373-20170114121259322-13686822.png 点击next,继续安装https://images2015.cnblogs.com/blog/940373/201701/940373-20170114121333025-584294080.png点击change..选择你安装的路径，然后点击nexthttps://images2015.cnblogs.com/blog/940373/201701/940373-20170114121433510-1182880724.png等待一会儿，会弹出安装jre的向导https://images2015.cnblogs.com/blog/940373/201701/940373-20170114121530260-1807093816.png可以选择安装路径，点击change选择安装路径，然后点击nexthttps://images2015.cnblogs.com/blog/940373/201701/940373-20170114121747447-1818858737.pnghttps://images2015.cnblogs.com/blog/940373/201701/940373-20170114121801135-1303178657.png点击next steps去查看官网文档API等，点击close完成安装
三、环境变量配置 安装完成，cd到你的安装路径下 安装路径如下图： https://images2015.cnblogs.com/blog/940373/201701/940373-20170114122620806-1275102002.png 那两个文件夹分别是JDK和JRE的安装位置，cd到JDK\bin中执行Java命令
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F:\Java\JDK\bin>dir Volume in drive F has no label. Volume Serial Number is 692A-C80C Directory of F:\Java\JDK\bin2017/01/1412:04 <DIR> .2017/01/1412:04 <DIR> ..2017/01/1412:04 15,904 appletviewer.exe2017/01/1412:04 16,416 extcheck.exe2017/01/1412:04 16,416 idlj.exe2017/01/1412:04 34,336 jabswitch.exe2017/01/1412:04 15,904 jar.exe2017/01/1412:04 16,416 jarsigner.exe2017/01/1412:04 15,904 java-rmi.exe2017/01/1412:04 206,880 java.exe2017/01/1412:04 15,904 javac.exe2017/01/1412:04 16,416 javadoc.exe2017/01/1412:04 133,664 javafxpackager.exe2017/01/1412:04 15,904 javah.exe2017/01/1412:04 15,904 javap.exe2017/01/1412:04 133,664 javapackager.exe2017/01/1412:04 206,880 javaw.exe2017/01/1412:04 318,496 javaws.exe2017/01/1412:04 15,904 jcmd.exe2017/01/1412:04 16,928 jconsole.exe2017/01/1412:04 16,416 jdb.exe2017/01/1412:04 15,904 jdeps.exe2017/01/1412:04 15,904 jhat.exe2017/01/1412:04 16,416 jinfo.exe2017/01/1412:04 15,904 jjs.exe2017/01/1412:04 174,624 jli.dll2017/01/1412:04 16,416 jmap.exe2017/01/1412:04 321,568 jmc.exe2017/01/1412:04 417 jmc.ini2017/01/1412:04 15,904 jps.exe2017/01/1412:04 16,416 jrunscript.exe2017/01/1412:04 16,416 jsadebugd.exe2017/01/1412:04 16,416 jstack.exe2017/01/1412:04 15,904 jstat.exe2017/01/1412:04 15,904 jstatd.exe2017/01/1412:04 196,640 jvisualvm.exe2017/01/1412:04 16,416 keytool.exe2017/01/1412:04 16,416 kinit.exe2017/01/1412:04 16,416 klist.exe2017/01/1412:04 16,416 ktab.exe2017/01/1412:04 829,264 msvcr100.dll2017/01/1412:04 16,416 native2ascii.exe2017/01/1412:04 16,416 orbd.exe2017/01/1412:04 16,416 pack200.exe2017/01/1412:04 16,416 policytool.exe2017/01/1412:04 15,904 rmic.exe2017/01/1412:04 15,904 rmid.exe2017/01/1412:04 16,416 rmiregistry.exe2017/01/1412:04 16,416 schemagen.exe2017/01/1412:04 16,416 serialver.exe2017/01/1412:04 16,416 servertool.exe2017/01/1412:04 16,416 tnameserv.exe2017/01/1412:04 197,152 unpack200.exe2017/01/1412:04 15,904 wsgen.exe2017/01/1412:04 16,416 wsimport.exe2017/01/1412:04 16,416 xjc.exe 54 File(s) 3,435,377 bytes 2 Dir(s)51,645,952,000 bytes freeF:\Java\JDK\bin>java -versionjava version "1.8.0_111"Java(TM) SE Runtime Environment (build 1.8.0_111-b14)Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)F:\Java\JDK\bin>javacUsage: javac <options> <source files>where possible options include:-g Generate all debugging info-g:none Generate no debugging info-g:{lines,vars,source} Generate only some debugging info-nowarn Generate no warnings-verbose Output messages about what the compiler is doing-deprecation Output source locations where deprecated APIs are used-classpath <path> Specify where to find user class files and annotation processors-cp <path> Specify where to find user class files and annotation processors-sourcepath <path> Specify where to find input source files-bootclasspath <path> Override location of bootstrap class files-extdirs <dirs> Override location of installed extensions-endorseddirs <dirs> Override location of endorsed standards path-proc:{none,only} Control whether annotation processing and/or compilation is done.-processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery process-processorpath <path> Specify where to find annotation processors-parameters Generate metadata for reflection on method parameters-d <directory> Specify where to place generated class files-s <directory> Specify where to place generated source files-h <directory> Specify where to place generated native header files-implicit:{none,class} Specify whether or not to generate class files for implicitly referenced files-encoding <encoding> Specify character encoding used by source files-source <release> Provide source compatibility with specified releasehttps://common.cnblogs.com/images/copycode.gif
这样做比较麻烦，没次要用的时候，都需要到这个安装位置下来 我们需要添加安装的bin目录到系统环境变量中， https://images2015.cnblogs.com/blog/940373/201701/940373-20170114123358494-136852636.png 复制路径后，在系统环境变量中找到path,然后添加进去https://images2015.cnblogs.com/blog/940373/201701/940373-20170114124224385-1047299267.pnghttps://images2015.cnblogs.com/blog/940373/201701/940373-20170114124252041-1550965031.png之前安装的路径的JDK的bin路径就添加到系统环境变量中啦 F:\Java\JDK\bin在cmd下验证一下，任意路径
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C:\Windows\system32>java -versionjava version "1.8.0_111"Java(TM) SE Runtime Environment (build 1.8.0_111-b14)Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)C:\Windows\system32>E:E:\>java -versionjava version "1.8.0_111"Java(TM) SE Runtime Environment (build 1.8.0_111-b14)Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)E:\>javacUsage: javac <options> <source files>where possible options include:-g Generate all debugging info-g:none Generate no debugging info-g:{lines,vars,source} Generate only some debugging info-nowarn Generate no warnings-verbose Output messages about what the compiler is doing-deprecation Output source locations where deprecated APIs are used-classpath <path> Specify where to find user class files and annotation processors-cp <path> Specify where to find user class files and annotation processors-sourcepath <path> Specify where to find input source files-bootclasspath <path> Override location of bootstrap class files-extdirs <dirs> Override location of installed extensions-endorseddirs <dirs> Override location of endorsed standards path-proc:{none,only} Control whether annotation processing and/or compilation is done.-processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery process-processorpath <path> Specify where to find annotation processors-parameters Generate metadata for reflection on method parameters-d <directory> Specify where to place generated class files-s <directory> Specify where to place generated source files-h <directory> Specify where to place generated native header files-implicit:{none,class} Specify whether or not to generate class files for implicitly referenced files-encoding <encoding> Specify character encoding used by source files-source <release> Provide source compatibility with specified release-target <release> Generate class files for specific VM version-profile <profile> Check that API used is available in the specified profile-version Version information-help Print a synopsis of standard options-Akey[=value] Options to pass to annotation processors-X Print a synopsis of nonstandard options-J<flag> Pass <flag> directly to the runtime system-Werror Terminate compilation if warnings occur@<filename> Read options and filenames from filehttps://common.cnblogs.com/images/copycode.gif
四、编写hello world程序运行一下， 创建文件HelloWorld.java， 文件名字与类名对应，文件类型.javapublic class HelloWorld{ public static void main(String[] args) { System.out.println("Hello World"); }}
cd到helloworld.java路径下
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E:\Java>dir Volume in drive E has no label. Volume Serial Number is 35EE-5207 Directory of E:\Java2017/01/1412:49 <DIR> .2017/01/1412:49 <DIR> ..2017/01/1412:49 130 HelloWorld.java2016/07/1209:18 <DIR> httpcomponents-client-4.5.22016/07/1209:17 3,047,752 httpcomponents-client-4.5.2-bin.zip2016/07/1208:59 1,643,553 httpcomponents-client-4.5.2-src.zip2015/12/1408:35 <DIR> sqljdbc_4.2 3 File(s) 4,691,435 bytes 4 Dir(s)40,363,429,888 bytes freeE:\Java>javac HelloWorlderror: Class names, 'HelloWorld', are only accepted if annotation processing is explicitly requested1 errorE:\Java>javac HelloWorld.javaE:\Java>java HelloWorldHello Worldhttps://common.cnblogs.com/images/copycode.gif
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