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• Generics & Collections!

  - by RayAllen

  I had a doubt. Why,generics (in java or any other lang), works with the objects and not with primitive types ? For e.g Gen< Integer inum=new Gen< Integer(100); works fine , but Gen< int inums=new Gen< int(100); is not allowed. Thanks !

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• Java - Interfaces

  - by RayAllen

  I had a doubt .. Why do we need interface in Java ? Instead of interface can't we write the methods in the class itself ? Why do we need seperate interface?

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• Why don't Generics support primitive types?

  - by RayAllen

  Why Generics (in Java) works with the objects but not with primitive types? For example Gen<Integer> inum = new Gen<Integer>(100); // works fine, but Gen<int> inums = new Gen<int>(100); // is not allowed. Thanks !

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• Java - Multithreading

  - by RayAllen

  I have a doubt ... Can we call thread_object.start() from within a constructor ? Is this approach a good idea ? Thanks.

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• What is the use of Java Interfaces? [closed]

  - by RayAllen

  Possible Duplicate: How will I know when to create an interface? Why do we need interfaces in Java? Instead of interface can't we write the methods directly in the class itself? Why do we need a separate interface?

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• Constructors in Programming languages

  - by RayAllen

  Why constructor is not considered as member of a class ? Is there any specific reason ? Thanks and regards.

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