Java - 如何使用字符串调用类的方法？

Question

我正在尝试使用控制台的输入来选择我想要运行的类的主要方法。 包运行；

import java.lang.reflect.Method;
import java.util.Scanner;
import testing.*;

public class run {
    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, SecurityException{
        Scanner input = new Scanner(System.in);
        String name = "testing."+input.nextLine();
        Class Program = Class.forName(name);
        //Try 1
        Program obj = new Program();
        //Got error "Program cannot be resolved to a type" on program and program
        //Try 2
        Program.main();
        //Got error "The method main() is undefined for the type Class" on main
        //Try 3
        Class.forName(name).main();
        //Got error "The method main() is undefined for the type Class<capture#2-of ?>" on main

    }
}

Answer 1

Class program = Class.forName(name);
program.getDeclaredMethod("main", String[].class).invoke(null, new Object[]{args});

提供您的main方法是public static void main(String[] args)