Java 中integer为什么范围取值要在-128到+127？ - 知乎
20 June 2025 admin
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你这个说的应该是Integer的缓存对象数值范围，也就是说JDK认为整型在这个范围内-128到127的使用较频繁，为了提高性能，避免反复创建对象，所以对这个范围内的数值对应的Integer直接缓存起来了。
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