java的Integer中也会有缓存

https://blog.csdn.net/suifengyongyuan/article/details/124356203

默认缓存了 [-128 ~ 127]

Integer m = new Integer(1);

Integer n = new Integer(1);

m==n //false 因为new时 生成不同引用地址

Integer m = 1;
Integer n = 1;
m==n //true 默认缓存了 [-128 ~ 127]

Integer m = 128;
Integer n = 128;
m==n //false