java - "AWT widgets written in Java which delegated to peer classes that were written in C"是什么意思？

Question

我不明白

的意思

The original Java AWT was implemented by having widgets written in Java which delegated to peer classes that were written in C

“用 C 编写的对等类” 部分:

这意味着 Java 类包含 native 代码？

Answer 1

Hotspot Java 有相当一部分运行时系统是用 C/C++ 编写的。有一次，这包括 AWT 对等类。 (而且它仍然可以......)

native 代码不在 Java 中。相反，Java 通常具有 native 方法声明，这些方法声明通常在加载相应的 native 库时绑定(bind)到 native 实现。

(但不要将此视为绿灯，在您的代码中做同样的事情。与 native 代码交互是棘手的，如果您弄错了，您可能会触发严重的 JVM 崩溃......痛……)