Class.forName(ObjectName).newInstance()

[nurkhasanah]

I've problem with Class.forName(ObjectName).newInstance()

I don't know the mean of that code. Could everybody explain it to me?
What's the function of Class.forName() ???
What's "newInstance()" mean ?

[DarrylBurke]

You have more problems than that if you think this is a Swing/AWT question. Or is it that you can't be bothered to put in the effort to post in the correct subforum?

db

[Javarichclient]

Class.forName(...).newInstance() is a way of creating an instance of a class at runtime using the Java Reflection API. Here is an example:

String className = ""java.util.Vector";
Class cls = Class.forName(className);
List list = (List)cls.newInstance();

The cls.newInstance() calls the default constructor to create a new instance of the class.

Normally you would use reflection when you want to determine the implementation at runtime instead of at compile time. This is the main concept behind Dependency Injection. You define interfaces and provide the implementation of the interface at runtime through some configuration.

I hope this answers your question.