Dynamic Creation of Class Name

Question

I just want to create the class name on the fly.
Look the example below.
String className = "gui.Header";
className header = new className;
Let's assume that there is a Header class somewhere.
Is this possible? or is there a way to do this?

Answer 1

From what i understand, u wish to create an instance of a class whose name is known to you at runtime - correct me if i'm wrong - i'll answer based on my assumption. You can basically do that using Reflection in Java. I'm pasting sample code which shows how you do this:
The following sample program creates an instance of the Rectangle class using the no-argument constructor by calling the newInstance method:
import java.lang.reflect.*;
import java.awt.*;
class SampleNoArg {
public static void main(String[] args) {
Rectangle r = (Rectangle) createObject("java.awt.Rectangle");
System.out.println(r.toString());
static Object createObject(String className) {
Object object = null;
try {
Class classDefinition = Class.forName(className);
object = classDefinition.newInstance();
} catch (InstantiationException e) {
System.out.println(e);
} catch (IllegalAccessException e) {
System.out.println(e);
} catch (ClassNotFoundException e) {
System.out.println(e);
return object;
Hope the above helps.
John Morrison