java – 如何增加Integer对象的缓存大小

在读这篇question时

我知道我们可以通过这个评论来增加缓存的大小

The recent version of Java 6 support changing the maximum cache value to greater than 127

我谷歌它但没有发现做同样的事情.

请帮忙.

解决方法:

IntegerCache例如这样说：

/**
 * Cache to support the object identity semantics of autoboxing for values between 
 * -128 and 127 (inclusive) as required by JLS.
 *
 * The cache is initialized on first usage. During VM initialization the
 * getAndRemoveCacheProperties method may be used to get and remove any system
 * properites that configure the cache size. At this time, the size of the
 * cache may be controlled by the vm option -XX:AutoBoxCacheMax=<size>.

因此要么使用VM参数,要么使用System属性,如：

-Djava.lang.Integer.IntegerCache.high=256

启动JVM时.

标签：java,caching,java-6
来源： https://codeday.me/bug/20190829/1763832.html