Get the minimum value of a given integer array. Complexity = O (n)

gistfile1.java

public static int getMin(int[] a) {
   if (a == null) {
      return 0;
   }
   if (a.length == 1) {
      return a[0];
   }
   int min = a[0];
   for (int i = 0; i < a.length; i++) {
      if (a[i] < min) {
         min = a[i];
      }
   }
   return min;
}