最基本的反射 通過一個類的根目錄 String生成（newInstance）一個物件

介面

package org.fashe.test;

public interface FansheInterface {
    public void shuchu();
}

實現

package org.fashe.test;

public class FansheImpl implements FansheInterface {

    public void shuchu() {
        System.out.println("反射成功！！");

    }

}
 

main方法測試

package org.fashe.test;

public class Testfashe {
    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
     Class forName = Class.forName("org.fashe.test.FansheImpl");
     FansheInterface fasheobj  = (FansheInterface) forName.newInstance();
     fasheobj.shuchu();
    }

}