詳解java中反射機(jī)制（含數(shù)組參數(shù)）

/**
 * @(#)TestInt.java
 * 
 * @author soda E-mail:sujun10@21cn.com
 * @version 1.0
 * <br>Copyright (C), 2007 soda.C
 * <br>This program is protected by copyright laws.
 * <br>Date:2007.4
 */
import java.lang.reflect.Method;

public class TestInt 
{
  //測(cè)試方法
  public String test(String name,int i)
  {
    System.out.println("name:" + name);
    System.out.println(i);
    return "反射成功!";
  }

  public static void main(String[] args)
  {
    try
    {
      //獲取class文件，可以Class.for("Test")獲取，這樣也可以根據(jù)字符串生成類啦
      Class te = TestInt.class;
      Class[] cl = new Class[2];
      //添加參數(shù)類型
      cl[0] = String.class;
      cl[1] = int.class;
      System.out.println("11111111");
      //根據(jù)public的方法，以及參數(shù)，參數(shù)是Class[]形式
      Method method = te.getMethod("test", cl);
      System.out.println("222222222222");
      //開始填充參數(shù)
      Object[] params = new Object[2];
      //params[0] = new String("soda");
      params[0] = new String("soda");
      params[1] = new Integer(23);
      System.out.println("22222222222");
      //獲取該class的實(shí)例
      Object obj = te.newInstance();
      //進(jìn)行方法調(diào)用
      Object result = method.invoke(obj, params);
      System.out.println("結(jié)果:" + result);
    }
    catch (Exception e)
    {
      System.out.println(e);
    }
    
  }
}

/**
 * @(#)Test.java
 * 
 * @author soda E-mail:sujun10@21cn.com
 * @version 1.0
 * <br>Copyright (C), 2007 soda.C
 * <br>This program is protected by copyright laws.
 * <br>Program Name:FlashSyncServer
 * <br>Date:2007.1
 */
import java.lang.reflect.Method;
//這里我就不做什么解釋了，和前面的幾乎一樣，大家也可以自己去查查api，Class類的api
public class Test 
{
  public void test(double[] dou)
  {
    System.out.println(dou.length);
    System.out.println(dou[0]);
  }
  public static void main(String[] args) throws Exception
  {
    try
    {
      Class[] cl = new Class[1];
      cl[0] = double[].class;
      System.out.println("cl[0]:" + cl[0]);
      Object[] in = new Object[1];
      //注意這里，不是Double[]，而是double[]。這里不能用對(duì)象數(shù)組
      double[] db = new double[1];
      db[0] = 100.0;
      in[0] = db;
      Class te = Test.class;
      Method method = te.getMethod("test", cl);
      Object obj = te.newInstance();
      Object objs = method.invoke(obj, in);
    }
    catch (Exception e)
    {
      System.out.println(e);
    }
    
  }
}