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Generic Object creation

Pratap Dalai
Member Posts: 27 Red Ribbon
Please tell me why the below code is giving error.
class parent<T>
{
T ob;
public parent()
{
ob=new T(); // Can not create an instance of parameterized type
}
Answers
-
Generic type parameters do not exist at runtime. Generic information is is erased in runtime.
Explanation here Erasure of Generic Types (The Java™ Tutorials > Learning the Java Language > Generics (Updated))
Alternatives options.
public class Parent<T> { private T ob; public Parent(T ob) { this.ob = ob; } public void setOb(T ob) { this.ob = ob; } public Parent(Class<T> cls) throws InstantiationException, IllegalAccessException { ob = cls.newInstance(); }}
This discussion has been closed.