Java: construct a class with parameters in reflection

Here is a simple example for constructing a object with two parameters in Java Reflection:

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import java.lang.reflect.*;

public class LoadParamObject {

public LoadParamObject() {}

public LoadParamObject(int a, String b) {

System.out.println("a = " + a + " b = " + b);

}

public static void main(String args[]) {

try {

Class cls = Class.forName("LoadParamObject");
Class partypes[] = new Class[2];
partypes[0] = Integer.TYPE;
partypes[1] = String.class;
Constructor ct = cls.getConstructor(partypes);
Object arglist[] = new Object[2];
arglist[0] = new Integer(37);
arglist[1] = new String("BBB");
Object retobj = ct.newInstance(arglist);

} catch (Throwable e) {

System.err.println(e);

}

}

}
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The detail explanation please read below:
http://java.sun.com/developer/technicalArticles/ALT/Reflection/