mac 怎么更新java

1.如何更新

　System preference->java ->更新

2.如何更新java path的值

sudo rm /usr/bin/java 
sudo ln -ns /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java /usr/bin/java

but 

mv: rm /usr/bin/java: Operation not permitted

Seems like the problem with the new System Integration Protection (a.k.a rootless) that just got introduced with the new OS X.

You could try to disable the rootless in recovery mode through these steps :

1. go to recovery mode (reboot and hold down Command + R keys simultaneously after you hear the startup chime)
2. When the “OS X Utilities” screen appears, pull down the ‘Utilities’ menu at the top of the screen instead, and choose “Terminal”
3. run this command csrutil disable;reboot. This will reboot the laptop.

After that. Then, try to run the command again and see what will happen

 

 

Now, java -version

java 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)