Java：“局部变量可能未被初始化”不够智能？ [英] Java: "Local variable may not have been initialized" not intelligent enough?

问题描述

请考虑以下方法：

void a ()
{
    int x;
    boolean b = false;
    if (Math.random() < 0.5)
    {
        x = 0;
        b = true;
    }
    if (b)
        x++;
}

在 x ++ 得到局部变量可能没有被初始化的错误。显然，x永远不会被初始化。有没有办法抑制警告，除非通过初始化x？谢谢。

On x++ I get the "Local variable may not have been initialized" error. Clearly x will never be used uninitialized. Is there any way to suppress the warning except by initializing x? Thanks.

推荐答案

不，没有办法 Java 程序的可能的代码路径来确定变量是否已经被初始化，所以它采取安全路由并警告你。

No, there is no way Java can examine all possible code paths for a program to determine if a variable has been initialized or not, so it takes the safe route and warns you.

不，你必须初始化你的变量来摆脱这个。

So no, you will have to initialize your variable to get rid of this.

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