java interview and tuning parameters -JVM

JVM parameter types:

1, the standard parameters:

java -version  
java -help

2, X parameters:

-Xmixed Mixed Mode

-Xint interpreted

-Xcomp for the first time compiled to native code

wujuhongdeMacBook-Pro:~ wujuhong$ 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)
wujuhongdeMacBook-Pro:~ wujuhong$ java -Xint -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, interpreted mode)
wujuhongdeMacBook-Pro:~ wujuhong$ java -Xcomp -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, compiled mode)
wujuhongdeMacBook-Pro:~ wujuhong$ 

XX parameters :

How to view the default JVM system parameters