java反射机制

public class AdminSub {
private String id = "";

public String getId() {
System.out.println(id);
return id;
}
public void setId(String id) {
this.id = id;
}
}





import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Admin {
public Admin(){

}

public static void main(String[] args)
throws ClassNotFoundException, InstantiationException, IllegalAccessException,
SecurityException, NoSuchMethodException, IllegalArgumentException, InvocationTargetException {

String str="AdminSub"; //class路径
Class c=Class.forName(str);
Object obj=c.newInstance();

//        这里是里设置属性的值 调用方法
Method m = c.getMethod("setId",new Class[]{Class.forName("java.lang.String")});
m.invoke(obj,new Object[]{"出入参数！"});

//        这里是里获取属性的值
    m = c.getMethod("getId",new Class[]{});
    String cc=m.invoke(obj,new Object []{}).toString();
  
System.out.println("输出: "+cc);
  
}

}