Java反射简单小实例

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

public class Admin {

public Admin(){
} 

private String id = ""; 

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

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

String str="Admin"; 
Class c=Class.forName(str); 
Object obj=c.newInstance();

//这里是里设置属性的值 
Method m = c.getMethod("setId",new Class[]{Class.forName("java.lang.String")}); 
m.invoke(obj,new Object[]{"penghao122"});