摘要：
public static void main(String[] args) { Integer a=1; Integer b=2; Integer c=3; Integer d=3; Integer e=321; Integer f=321; Long g=3L; System.out.println(c==d); System.out.println(e==f); System.out.println(c==(a+b)); System.out.println(c.equals(a+b)); System.out.println(g==(a+b)); Syst... 阅读全文