通过反射调用对象的方法

这是个测试用的例子,通过反射调用对象的方法。
TestRef.java
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;

/**
* Created by IntelliJ IDEA.
* File: TestRef.java
* User: String
* Date: 2010-3-29 14:48:44
*/

public class TestRef {

public static void main(String args[]) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
Foo foo = new Foo(“这个一个Foo对象!”);
Class clazz = foo.getClass();
Method m1 = clazz.getDeclaredMethod(“outInfo”);
Method m2 = clazz.getDeclaredMethod(“setMsg”, String.class);
Method m3 = clazz.getDeclaredMethod(“getMsg”);
m1.invoke(foo);
m2.invoke(foo, “重新设置msg信息!”);
String msg = (String) m3.invoke(foo);
System.out.println(msg);
}
}

class Foo {
private String msg;

public Foo(String msg) {
this.msg = msg;
}

public void setMsg(String msg) {
this.msg = msg;
}

public String getMsg() {
return msg;
}

public void outInfo() {
System.out.println(“这是测试Java反射的测试类”);
}
}

控制台输出结果:
这是测试Java反射的测试类
重新设置msg信息!

Process finished with exit code 0


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