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问题描述
我遇到了这个Java代码:
I came across this Java code:
static { String aux = "value"; try { // some code here } catch (Exception e) { } String UUID_prefix = aux + ":"; }我是Java的新手,请解释这里发生的事情。
I am new to Java, please explain what is happening here.
推荐答案这是一个静态初始化块。可以把它想象成构造函数的静态版本。在实例化类时运行构造函数;静态初始化块在类加载时运行。
This is a static initialization block. Think of it like a static version of the constructor. Constructors are run when the class is instantiated; static initialization blocks get run when the class gets loaded.
您可以将它们用于这样的事情(显然是伪造的代码):
You can use them for something like this (obviously fabricated code):
private static int myInt; static { MyResource myResource = new MyResource(); myInt = myResource.getIntegerValue(); myResource.close(); }请参阅有关初始化字段的Oracle教程。
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Static {}在Java语法中的含义是什么?
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