Integer关于面试问题

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public class Demo4_Integer面试题 {
    public static void main(String[] args) {
        Integer s1 = new Integer(98);
        Integer s2 = new Integer(23);
        System.out.println(s1 == s2);
        System.out.println(s1.equals(s2));
        System.out.println("===============");
        Integer s3 = 200;
        Integer s4 = 200;//超过byte的范围了则是重新创建对象
        System.out.println(s3 == s4);
        System.out.println(s3.equals(s4));

        Integer s5 = 89;
        Integer s6 = 89;//在Integer的范围在-128~127之间的数,内存中不重新创建新的对象,而是从常量池中那,
        //超过则是重新创建.
        System.out.println(s5 == s6);
        System.out.println(s5.equals(s6));
    }
}