我猜你正在使用 Run | 运行文件运行文件(或shift-F6)而不是Run |运行主项目.NetBeans 7.1 帮助文件(F1 是您的朋友！)说明了 Arguments 参数:

I am guessing that you are running the file using Run | Run File (or shift-F6) rather than Run | Run Main Project. The NetBeans 7.1 help file (F1 is your friend!) states for the Arguments parameter:

在应用程序执行期间添加要传递给主类的参数.请注意，不能将参数传递给单个文件.

Add arguments to pass to the main class during application execution. Note that arguments cannot be passed to individual files.

我用一小段代码验证了这一点:

I verified this with a little snippet of code:

public class Junk
{
    public static void main(String[] args)
    {
        for (String s : args)
            System.out.println("arg -> " + s);
    }
}

我将 Run -> Arguments 设置为 x y z.当我自己运行文件时，我没有输出.当我运行项目时，输出是:

I set Run -> Arguments to x y z. When I ran the file by itself I got no output. When I ran the project the output was:

arg -> x
arg -> y
arg -> z