根據

http://www.iteye.com/topic/137944

文檔進行學習

代碼如下:

package reflectTest;

import java.lang.reflect.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.*;

class A{

}

class B extends A{

}

class C extends B{

}

class TestClass extends Object implements ActionListener {

private int a = 3;

public Integer b = 4;

public TestClass(){}

public TestClass(int id,String name){}

public void Abc(int id,String name){}

public void ActionPerformed(ActionEvent e){}

}

public class Main {

public static void main(String[] args) {

// TODO Auto-generated method stub

TestClass tc = new TestClass();

Class temp = tc.getClass();

//==============================================

try{

System.out.println("反射類中所有公有的屬性");

Field[] fb = temp.getFields();

for(int i=0;i < fb.length;i++)

{

Class cl = fb[i].getType();

System.out.println("fb: "+cl);

}

System.out.println("反射類中所有的屬性");

Field[] fa = temp.getDeclaredFields();

for(int i = 0;i < fa.length;i++)

{

Class cl = fa[i].getType();

System.out.println("fa: "+cl);

}

System.out.println("反射類中私有屬性的值");

Field f = temp.getDeclaredField("a");

f.setAccessible(true);

Integer i = (Integer)f.get(tc);

System.out.println(i);

//===============================

String className = temp.getName();

Constructor[] constructs = temp.getConstructors();

for(int k = 0;k < constructs.length;k++)

{

Class[] Parametertypes = constructs[k].getParameterTypes();

System.out.print(className + "(");

for(int j =0 ;j < Parametertypes.length;j++)

{

System.out.print(Parametertypes[j].getName()+" ");

}

System.out.println(")");

}

//==================================================================

Class[] interfaces = temp.getInterfaces();

for(int j = 0;j

{

System.out.println(interfaces[j].getName());

}

Class superClass = temp.getSuperclass();

System.out.println(superClass.getName());

//=================================================================

C c = new C();

Class t = c.getClass();

Class superClass1 = t.getSuperclass();

System.out.println(c);

System.out.println(c.getClass());

System.out.println(c.getClass().getSuperclass());

System.out.println(c.getClass().getSuperclass().getSuperclass());

}catch(Exception e)

{

System.out.println(e);

}

}

}

運行結果如下:

反射類中所有公有的屬性

fb: class java.lang.Integer

反射類中所有的屬性

fa: int

fa: class java.lang.Integer

反射類中私有屬性的值

3

reflectTest.TestClass()

reflectTest.TestClass(int java.lang.String )

java.awt.event.ActionListener

java.lang.Object

reflectTest.C@70dea4e

class reflectTest.C

class reflectTest.B

class reflectTest.A

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