guava 的好处 示例 1

public class GuavaTester {

   public static void main(String args[]) {

      GuavaTester guavaTester = new GuavaTester();



      Integer a =  null;

      Integer b =  new Integer(10);

      System.out.println(guavaTester.sum(a,b));

   }



   public Integer sum(Integer a, Integer b) {

      return a + b;

   }

}