Programmer algorithm practice must read, common Java API skills to share>>> 
Tools -> Generate Javadoc…
Generally, there are two problems in generating doc
Solutions are set in other command link arguments
1. NullPointerException exception
Scheme: – bootclasspath D:: – soft/android-sdk-windows/platforms/android-23/android.jar
Note that for different computers, – bootclasspath does not need to be modified, just the specific android.jar address
2. GBK garbled
Scheme: – encoding UTF-8 – charset UTF-8
In conclusion:
Just set it in the other command link arguments
-encoding utf-8 -charset utf-8 -bootclasspath D:\Soft\android-sdk-windows\platforms\android-23\android.jar
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