There are so many ways to declare main() method  or so many predefined signature to declare main() method in java which could be understand by JVM.


p=public 
s=static 
v=void 
m=main 

for JDK1.0 up to all above version.
1.psvm(String[] a) 
2.spvm(String[] a) 
3.psvm(String []a) 
4.psvm(String a[]) 
5.spvm(String []a) 
6.spvm(String a[])
for JDK1.5 up to above version(VAR-ARGS) 
1.psvm(String... a) 
2.psvm(String...a) 
3.psvm(String ...a) 

4.spvm(String... a) 
5.spvm(String...a) 
6.spvm(String ...a)