JAVA 的反射机制

佚名 6年前 (2019-05-05) 随笔 2087人围观抢沙发百度已收录

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package Learn;


public class Main {

    public static void main(String[] args) throws InstantiationException, IllegalAccessException {
            try {
                Class c = Class.forName(args[0]);
                Stand stand = (Stand) c.newInstance();
                stand.start();
            } catch (ClassNotFoundException e) {
                System.err.println("something is wrong!!!");
                e.printStackTrace();
            }
    }
}

interface Stand{
    void start();
}

class B implements Stand{
    private int i = 0;
    public void start() {
        System.out.println(i);
        System.out.println("B...start");
    }
    
}

class C implements Stand{
    public void start() {
        System.out.println("C...start");
    }
}