Generics return type E











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0
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What is return type E in the following code



public E get(int index) {

  synchronized (mutex) {

    return super.get(index);

  }

}


Java doc says it's an Element. But i didn't get it correctly. It's helpful if i get explanation with an example.






java generics







share|improve this question






















  • I think it would probably really help to take a full-course tutorial on generics.
    – Jai
    Nov 8 at 3:11















up vote
0
down vote

favorite












What is return type E in the following code



public E get(int index) {

  synchronized (mutex) {

    return super.get(index);

  }

}


Java doc says it's an Element. But i didn't get it correctly. It's helpful if i get explanation with an example.






java generics







share|improve this question






















  • I think it would probably really help to take a full-course tutorial on generics.
    – Jai
    Nov 8 at 3:11













up vote
0
down vote

favorite









up vote
0
down vote

favorite











What is return type E in the following code



public E get(int index) {

  synchronized (mutex) {

    return super.get(index);

  }

}


Java doc says it's an Element. But i didn't get it correctly. It's helpful if i get explanation with an example.






java generics







share|improve this question













What is return type E in the following code



public E get(int index) {

  synchronized (mutex) {

    return super.get(index);

  }

}


Java doc says it's an Element. But i didn't get it correctly. It's helpful if i get explanation with an example.






java generics




java generics






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 8 at 2:58









Nibras

78214




78214












  • I think it would probably really help to take a full-course tutorial on generics.
    – Jai
    Nov 8 at 3:11


















  • I think it would probably really help to take a full-course tutorial on generics.
    – Jai
    Nov 8 at 3:11
















I think it would probably really help to take a full-course tutorial on generics.
– Jai
Nov 8 at 3:11




I think it would probably really help to take a full-course tutorial on generics.
– Jai
Nov 8 at 3:11












1 Answer
1






active

oldest

votes

















up vote
3
down vote



accepted










It's whatever you say it is. If you have a Mutex<Integer> then it's an Integer. If you have a Mutex<String> then it's a String. If you have a Mutex<Cheeseburger> then it's a Cheeseburger. E is a special kind of variable, sort of like int index in your example. The difference is that E takes on types, not values.






share|improve this answer























  • E is not a variable, but its type
    – azro
    Nov 8 at 3:07










  • I've edited to clarify. I meant E is a type variable. I didn't mean to imply that E was a value-level construct.
    – Silvio Mayolo
    Nov 8 at 3:08










  • So what's the difference between T and E?
    – Nibras
    Nov 8 at 3:20






  • 5




    @Nibras I really suggest you start from tutorials. Asking difference of T and E clearly shows that you have not read any tutorials on this topic. It takes a lot of effort to explain this when you are lacking the fundamental knowledge.
    – Jai
    Nov 8 at 3:25











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
3
down vote



accepted










It's whatever you say it is. If you have a Mutex<Integer> then it's an Integer. If you have a Mutex<String> then it's a String. If you have a Mutex<Cheeseburger> then it's a Cheeseburger. E is a special kind of variable, sort of like int index in your example. The difference is that E takes on types, not values.






share|improve this answer























  • E is not a variable, but its type
    – azro
    Nov 8 at 3:07










  • I've edited to clarify. I meant E is a type variable. I didn't mean to imply that E was a value-level construct.
    – Silvio Mayolo
    Nov 8 at 3:08










  • So what's the difference between T and E?
    – Nibras
    Nov 8 at 3:20






  • 5




    @Nibras I really suggest you start from tutorials. Asking difference of T and E clearly shows that you have not read any tutorials on this topic. It takes a lot of effort to explain this when you are lacking the fundamental knowledge.
    – Jai
    Nov 8 at 3:25















up vote
3
down vote



accepted










It's whatever you say it is. If you have a Mutex<Integer> then it's an Integer. If you have a Mutex<String> then it's a String. If you have a Mutex<Cheeseburger> then it's a Cheeseburger. E is a special kind of variable, sort of like int index in your example. The difference is that E takes on types, not values.






share|improve this answer























  • E is not a variable, but its type
    – azro
    Nov 8 at 3:07










  • I've edited to clarify. I meant E is a type variable. I didn't mean to imply that E was a value-level construct.
    – Silvio Mayolo
    Nov 8 at 3:08










  • So what's the difference between T and E?
    – Nibras
    Nov 8 at 3:20






  • 5




    @Nibras I really suggest you start from tutorials. Asking difference of T and E clearly shows that you have not read any tutorials on this topic. It takes a lot of effort to explain this when you are lacking the fundamental knowledge.
    – Jai
    Nov 8 at 3:25













up vote
3
down vote



accepted







up vote
3
down vote



accepted






It's whatever you say it is. If you have a Mutex<Integer> then it's an Integer. If you have a Mutex<String> then it's a String. If you have a Mutex<Cheeseburger> then it's a Cheeseburger. E is a special kind of variable, sort of like int index in your example. The difference is that E takes on types, not values.






share|improve this answer














It's whatever you say it is. If you have a Mutex<Integer> then it's an Integer. If you have a Mutex<String> then it's a String. If you have a Mutex<Cheeseburger> then it's a Cheeseburger. E is a special kind of variable, sort of like int index in your example. The difference is that E takes on types, not values.







share|improve this answer














share|improve this answer



share|improve this answer








edited Nov 8 at 3:07

























answered Nov 8 at 3:06









Silvio Mayolo

13.4k22252




13.4k22252












  • E is not a variable, but its type
    – azro
    Nov 8 at 3:07










  • I've edited to clarify. I meant E is a type variable. I didn't mean to imply that E was a value-level construct.
    – Silvio Mayolo
    Nov 8 at 3:08










  • So what's the difference between T and E?
    – Nibras
    Nov 8 at 3:20






  • 5




    @Nibras I really suggest you start from tutorials. Asking difference of T and E clearly shows that you have not read any tutorials on this topic. It takes a lot of effort to explain this when you are lacking the fundamental knowledge.
    – Jai
    Nov 8 at 3:25


















  • E is not a variable, but its type
    – azro
    Nov 8 at 3:07










  • I've edited to clarify. I meant E is a type variable. I didn't mean to imply that E was a value-level construct.
    – Silvio Mayolo
    Nov 8 at 3:08










  • So what's the difference between T and E?
    – Nibras
    Nov 8 at 3:20






  • 5




    @Nibras I really suggest you start from tutorials. Asking difference of T and E clearly shows that you have not read any tutorials on this topic. It takes a lot of effort to explain this when you are lacking the fundamental knowledge.
    – Jai
    Nov 8 at 3:25
















E is not a variable, but its type
– azro
Nov 8 at 3:07




E is not a variable, but its type
– azro
Nov 8 at 3:07












I've edited to clarify. I meant E is a type variable. I didn't mean to imply that E was a value-level construct.
– Silvio Mayolo
Nov 8 at 3:08




I've edited to clarify. I meant E is a type variable. I didn't mean to imply that E was a value-level construct.
– Silvio Mayolo
Nov 8 at 3:08












So what's the difference between T and E?
– Nibras
Nov 8 at 3:20




So what's the difference between T and E?
– Nibras
Nov 8 at 3:20




5




5




@Nibras I really suggest you start from tutorials. Asking difference of T and E clearly shows that you have not read any tutorials on this topic. It takes a lot of effort to explain this when you are lacking the fundamental knowledge.
– Jai
Nov 8 at 3:25




@Nibras I really suggest you start from tutorials. Asking difference of T and E clearly shows that you have not read any tutorials on this topic. It takes a lot of effort to explain this when you are lacking the fundamental knowledge.
– Jai
Nov 8 at 3:25


















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