What is the correct and incorrect piece of code for generic representation in Java? [Onward Java 5]

Problem statement: We need to find out the correct pieces of java code.

1. ArrayList<Integer> l = new ArrayList<>();
2. ArrayList<Integer> l = new ArrayList<Integer>();
3. ArrayList<int> l = new ArrayList<int>();
4. ArrayList<int> l = new ArrayList<>();
5. LinkedList<Integer> l = new LinkedList<Integer>();
6. LinkedList<Integer> l = new LinkedList<>();
7. LinkedList<int> l = new LinkedList<>();
8. Map<String, Integer> m = new HashMap<String, Integer>();
9. Map<String, Integer> m = new HashMap<>();
10. Map<String, int> m = new HashMap<>();

Answer:

1. Correct- we can keep right angular braces empty
2. Correct- we can specify the right angular braces data type also
3. Incorrect-generic support only wrapper class for auto boxing to Object type
4. Incorrect-generic support only wrapper class for auto boxing to Object type
5. Correct- we can specify the right angular braces data type also
6. Correct- we can keep right angular braces empty
7. Incorrect- generic doen't support primitive data type
8. Correct - we can specify the right angular braces data type also
9. Correct - we can keep right angular braces empty
10. Incorrect- generic doen't support primitive data type