Is it only one chance i can initialize array with int [] a={3,2,1}

Question

is it only one chance i can initialize array with int [] a={3,2,1}
===============================
class InitializeArrayTest
     int [] a;     //i need keep a[] global
     public static void main(String args[])throws IOException
               //a=new int[] { 3, 2, 1};//can not complie<========why here is wrong
               a=new int[3];//also can not
               a={3,2,1};     //I want to use {3,2,1} as data for simple test purpose here for other method
}

Answer 1

so if static means only one instance allowed
for what reason there is no compiler error in the
coding below
     static int [] preSort;
     public B(int i)
int []preSort=new int; //<======why no syntax
You are declaring a new local variable called preSort, which has scope to the end of the constructor.