public class HelloWorld {??? public static void main(String[] args) {?? ??? ?boolean a = true; // a同意?? ??? ?boolean b = false; // b反對?? ??? ?boolean c = false; // c反對?? ??? ?boolean d = true; // d同意?? ?System.out.println((a&&b)+"未通過");??? System.out.println(（a||d）+"通過");??? System.out.println(（！a）+"未通過");??? System.out.println((c ^ d)+"通過");?? ??? ??? ??? ??? ?}}