System.out.println 输出结果是多少啊

public class Equivalence {

public static void main(String[] args) {

Integer n1 = new Integer(47);

Integer n2 = new Integer(47);

System.out.println(n1 == n2);

System.out.println(n1 != n2);

}

}

false

true

因为==比较的是2个对象是不是同一个

Integer n1 = new Integer(47);

Integer n2 =n1;

==是true

Integer n1 = new Integer(47);

Integer n2 = new Integer(47);

用 n1.equals(n2)是true