Mac-ios下JDK的安装路径(java)
苹果的Mac系统已经包含了完整的J2SE（Java SE），其中就有JDK和JVM（苹果叫VM），如果要升级JDK，需要自己下载安装。 在Mac系统中，JDK的安装路径与windows不同，默认目录是：/System/Libray/Frameworks/JavaVM.Framwork/。 在这个目录下有个Versions目录，里面有不同版本的JDK。
首先，让我们打开硬盘：Finder-->前往-->电脑-->Macintosh HD
在 ssh 工具中连接查看：
suningdeMac-mini:Frameworks suning$ ls
suningdeMac-mini:Frameworks suning$ ls
AGL.framework CoreDisplay.framework Foundation.framework LatentSemanticMapping.fra
AVFoundation.framework CoreFoundation.framework GLKit.framework LocalAuthentication.frame
AVKit.framework CoreGraphics.framework GLUT.framework MapKit.framework
Accelerate.framework CoreImage.framework GSS.framework MediaAccessibility.framew
Accounts.framework CoreLocation.framework GameController.framework MediaLibrary.framework
AddressBook.framework CoreMIDI.framework GameKit.framework MediaToolbox.framework
AppKit.framework CoreMIDIServer.framework GameplayKit.framework Message.framework
AppKitScripting.framework CoreMedia.framework Hypervisor.framework Metal.framework
AppleScriptKit.framework CoreMediaIO.framework ICADevices.framework MetalKit.framework
AppleScriptObjC.framework CoreServices.framework IMCore.framework ModelIO.framework
ApplicationServices.framework CoreTelephony.framework IMServicePlugIn.framework MultipeerConnectivity.fra
AudioToolbox.framework CoreText.framework IOBluetooth.framework NetFS.framework
AudioUnit.framework CoreVideo.framework IOBluetoothUI.framework NetworkExtension.framewor
AudioVideoBridging.framework CoreWLAN.framework IOKit.framework NotificationCenter.framew
Automator.framework CryptoTokenKit.framework IOSurface.framework OSAKit.framework
CFNetwork.framework DVComponentGlue.framework ImageCaptureCore.framework OpenAL.framework
CalendarStore.framework DVDPlayback.framework ImageIO.framework OpenCL.framework
Carbon.framework DirectoryService.framework InputMethodKit.framework OpenDirectory.framework
CloudKit.framework DiscRecording.framework InstallerPlugins.framework OpenGL.framework
Cocoa.framework DiscRecordingUI.framework InstantMessage.framework PCSC.framework
Collaboration.framework DiskArbitration.framework Intents.framework Photos.framework
Contacts.framework DrawSprocket.framework JavaFrameEmbedding.framework PhotosUI.framework
ContactsUI.framework EventKit.framework JavaScriptCore.framework PreferencePanes.framework
CoreAudio.framework ExceptionHandling.framework JavaVM.framework PubSub.framework
CoreAudioKit.framework FWAUserLib.framework Kerberos.framework Python.framework
CoreBluetooth.framework FinderSync.framework Kernel.framework QTKit.framework
CoreData.framework ForceFeedback.framework LDAP.framework Quartz.framework suningdeMac-mini:Frameworks suning$ cd JavaVM.framework/
suningdeMac-mini: JavaVM.framework suning$
suningdeMac-mini:JavaVM.framework suning$ ls
Frameworks JavaVM Resources Versions
suningdeMac-mini:JavaVM.framework suning$ cd Versions/
suningdeMac-mini:Versions suning$
suningdeMac-mini:Versions suning$ LS
A Current
suningdeMac-mini:Versions suning$ LS
A Current
suningdeMac-mini:Versions suning$ ls
A Current
suningdeMac-mini:Versions suning$ cd Current
suningdeMac-mini:Current suning$
suningdeMac-mini:Current suning$ LS
Commands Frameworks JavaPluginCocoa.bundle JavaVM Resources _CodeSignature
suningdeMac-mini:Current suning$ cd Frameworks/
suningdeMac-mini:Frameworks suning$ ls
JavaNativeFoundation.framework JavaRuntimeSupport.framework
suningdeMac-mini:Frameworks suning$ cd ..
suningdeMac-mini:Current suning$ ls
Commands Frameworks JavaPluginCocoa.bundle JavaVM Resources _CodeSignature
suningdeMac-mini:Current suning$ cd JavaVM
-bash: cd: JavaVM: Not a directory
suningdeMac-mini:Current suning$ java version
Unable to find a $JAVA_HOME at "/usr", continuing with system-provided Java...
用户安装的jdk:
接上图，bin文件下可以看到java,javac两个执行程序
