下面这段代码执行后打印结果为: public class Test { public static void main(String[] args) { int b[][] = { { 1 }, { 2, 2 }, { 2, 2, 2 } }; int sum = 1; for (int i = 0; i < b.length; i++) { for (int j = 0; j < b[i].length; j++) { sum *= b[i][j]; } } System.out.println("sum=" + sum); } }