class A { } class B extends A { } Object o1 = new A(); Object o2 = new B(); o1 instanceof A = true o1 instanceof B = false o2 instanceof A = true // ================ HERE o2 instanceof B = true o1.getClass().equals(A.class) = true o1.getClass().equals(B.class) = false o2.getClass().equals(A.class) = fals...[ 查看全文 ]