fix #856,find append varidac args type bug,find varidac args as parameter in body type bug
fix import missing bug in java.
fix #861
Merge pull request #862 from bronze1man/pr-861

fix #861NullPointerException in visitMethodDeclaration
Merge pull request #860 from bronze1man/pr-856

fix #856,find append varidac args type bug,find varidac args as parameter in body type bug