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public Object invokeMethod(String className, String methodName,
Object[] args) throws Exception{
Class ownerClass = Class.forName(className);
Object owner = ownerClass.newInstance();

Class[] argsClass = new Class[args.length];

for (int i = 0, j = args.length; i < j; i++) {

argsClass[i] = args[i].getClass();
}

Method method = ownerClass.getMethod(methodName, argsClass);
return method.invoke(owner, args);
}  
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ÎÒÃÇÔÚtomcatÖУ¬request¶ÔÏóµÄʵÀýÆäʵÊÇ£ºorg.apache.catalina.connector.ResponseFacade
ËüʵÏÖÁ˽ӿڣºjavax.servlet.http.HttpServletResponse;
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public ActionForward query(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response)
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        for (int i = 0, j = args.length; i < j; i++) {   
         
           argsClass[i] = args[i].getClass();             
        }  
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        for (int i = 0, j = args.length; i < j; i++) {   
         if(i == 3){
           argsClass[i] = HttpServletResponse.class;   
         


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package CH1;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class exercise001 extends JApplet {
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private double[] x;
private double[] y;
private double[] weight;
private int m;
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