是否可以使用JDK 1.7或更高版本在没有main()的情况下用Java编写程序? [英] Is it possible to write a program in Java without main() using JDK 1.7 or higher?
问题描述
当使用 JDK 1.6
或更低版本的 Hello world
> JDK 。
The following program will print Hello world
when compiled with JDK 1.6
or lower versions of JDK
.
public class A
{
static
{
System.out.println("Hello world");
System.exit(0);
}
}
但 JDK 1.7
或更高在编译上述程序时,版本将生成运行时错误,如下所示。
But JDK 1.7
or higher versions will generate a runtime error as follows when the above program is compiled.
Error: Main method not found in class A, please define the main method as:
public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application
我想知道是否有一些方法可以使用 JDK在Java中成功编译并运行没有
或更高。 main()
的程序1.7
I would like to know if there is some way to compile and run a program without main()
successfully in Java using JDK 1.7
or higher.
提前致谢。
推荐答案
没有。 public static void main(String [] args)
是所有Java应用程序的主条目。有让你相信的框架不需要这个方法,比如JUnit执行的单元测试,但事实是框架有一个 main
在其中的某个地方定义的方法,为你做必要的调用并结束调用你的代码。
No. public static void main(String[] args)
is the main entry for all Java applications. There are frameworks that makes you believe there's no need of this method, like a unit test executed by JUnit, but the fact is that the framework has a main
method defined somewhere inside it, does the necessary calls for you and ends calling your code.
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