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我正在开发一个程序来标记由一组学生提交的算法;每个学生都会提交他们自己的.java文件。动态创建和使用文件夹中的类
我想将所有这些文件(我不知道的名字)放到一个文件夹中。然后,我的程序将实例化这些类中的每一个,将它们添加到数组列表中,以便我可以调用每个类的主要方法并标记输出。
我被告知使用弹簧框架(如下所示);但是,我仍然无法访问主要方法。这是错误:
error: cannot find symbol
cls.main();
^
symbol: method main()
location: variable cls of type Class
1 error
有什么我错过了?任何帮助将不胜感激。
public class TeamMakerTester{
public static void main(String[] args){
ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(true);
provider.addIncludeFilter(new AssignableTypeFilter(Team.class));
// scan in org.example.package
Set<BeanDefinition> components = provider.findCandidateComponents("org/mysteryhobo/algorithms");
for (BeanDefinition component : components)
{
try{
Class cls = Class.forName(component.getBeanClassName());
cls.main(); //here
} catch (ClassNotFoundException cnfe){
System.out.println("Error: Class not found");
}
}
}
解决由欧文Bolwidt:
public class TeamMakerTester{
public static void main(String[] args){
ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(true);
provider.addIncludeFilter(new AssignableTypeFilter(Team.class));
// scan in org.example.package
Set<BeanDefinition> components = provider.findCandidateComponents("org/mysteryhobo/algorithms");
for (BeanDefinition component : components){
try{
Class<?> cls = Class.forName(component.getBeanClassName());
//cls.main();
Method m = cls.getMethod("main", String[].class);
String[] params = {}; // Insert any arguments that you want to pass
m.invoke(null, (Object) params);
}catch (ClassNotFoundException cnfe){
System.out.println("Error: Class not found");
}catch(NoSuchMethodException me){
System.out.println("Error: Method does not exist");
}catch (IllegalAccessException iae){
System.out.println("Error: Denied access to method");
}catch (InvocationTargetException ite){
System.out.println("Error: Invalid target method");
}
}
System.out.println("Test");
}
}
你先生,是个绅士和学者。 – mysteryhobo