Generic Object creation

Pratap Dalai

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

}

eudriscabrera-JavaNet

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();    }}