huahua325 wrote:
public static void main(String[] args) {
Integer n1 = new Integer (47);
Integer n2 = new Integer (47);
System.out.println(n1 == n1);
System.out.println(n1.equals(n1));
}

按理说，这段程序的输出结果是
false
true
但是在NetBeans中的输出结果是
true
true