How to store the data?

Question

Hi,
I'm new here, new to java
I have a java polymorphism question here, I have three classes,
Bicycle.java
public class Bicycle {
public void printClassName() {
System.out.println("Bicycle");
MountainBike.java
public class MountainBike{
public void printClassName() {
System.out.println("MountainBike");
TestBike.java
public class TestBike {
public ststic void main(String[] args) {
String type = "MountainBike";
Bicycle bike = new "type()";
bike.printClassName();
definitely, the type() is not correct here, is there any way to init the bike with a dynamic class without using switch/case?
Thanks.
peter

Answer 1

thanks, everyone, I got it finally.
actually, MountainBike is a subclass of Bicycle, I had a typo here,
my code something like that using java reflection,
TestBike.java
public class TestBike {
public ststic void main(String[] args) {
String type = "MountainBike";
CLass c = Class.forName(type);
Method m = c.getDeclareMethod("printClassName", null);
Object i = c.getnewInstance();
Object r = m.invoke(i, null);
I never used newInstance before, don't know the performance, because I may have lots of newInstance called.
sorry for the misleading of subject, actually, I want to ask another question to store data,
I had more than 40 files, I'd like to create a big xml to store the info of these files, like
<A>
<column>
<name>AC1</name>
<size>4</size>
<name>AC2</name>
<size>3</size>
</column>
</A>
<A2>
<column>
<name>A2C1</name>
<size>4</size>
<name>A2C2</name>
<size>3</size>
</column>
</A2>
because A, A2 is not a constant, I don't know how to parse the xml file with java, or I create seperate xml file like
A.xml
<column>
<name>AC1</name>
<size>4</size>
<name>AC2</name>
<size>3</size>
</column>
any idea?
Thanks.
peter