java8-汇总数组总的值及可变参数

public Integer test3(Integer ...args) {List<Integer> costBeforeTax = Arrays.asList(args);int sum = costBeforeTax.stream().reduce((a,b)->a+b).get() ;return sum;}public static void main(String[] args) {MavenTest t = new MavenTest();    System.out.println( t.test3(1,2,3,4,5) );}