将常规Int转换为Final Java [英] Cast Regular Int to Final Java

问题描述

我正在尝试在一个循环中实现一个内部类，并且遇到了一种有趣的情况.内部类具有方法，但是，当我尝试访问该变量时，Netbeans会给我一个编译器错误，并告诉我将int设置为final.

I am trying to implement an inner class within a loop, and have come into an interesting situation. The internal class has methods, however, when I try and access the variable, Netbeans gives me a compiler error and tells me to make the int final.

由于int是一个循环变量，因此不能为最终变量.我尝试创建新变量并将它们等同于循环变量，但这仍然会引发相同的错误.

As the int is a looping variable, it can not be final. I have tried creating new variables and equating them to the looping variable, but this still throws the same error.

这是基本语法(用伪代码):

Here is the basic syntax (in pseudo-code):

for(int i = 0; i < 10; i++)
{
     panels[i].printI(new printI(){System.out.println(i);});
}

有什么想法吗?

推荐答案

添加临时final变量以保存值:

Add a temporary final variable to hold the value:

for(int i = 0; i < 10; i++)
{
     final int tmp = i;
     panels[i].printI(new printI(){System.out.println(tmp);});
}

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