[DataStructure] Five methods to init the List in java, javainit

[DataStructure] Five methods to init the List in java, javainit
Do you know how to init list in other way into T for new object? The following will give you serveral tips. If having other great idea, you are welcome to share.

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1. Import java. util. ArrayList;
2. Import java. util. Arrays;
3. Import java. util. Collections;
4. Import java. util. List;
6. Public class ListUtil
7. {
9. /**
10. * Init the List with different methods.
11. *
12. * @ Time Jul 21,201 4 5:39:10
13. * @ Return void
14. */
15. Public static void init ()
16. {
17. // Use new to init List
18. List <String> firstList = new ArrayList <String> (0 );
19. FirstList. add ("ABC ");
20. FirstList. add ("mcm ");
21. FirstList. add ("CID ");
22. System. out. println (firstList );
24. // Use the string to init List
25. List <String> testList = Arrays. asList ("ABC", "di-"," CID ");
26. System. out. println (testList );
27. // Output: [ABC, ABC, GFG, CID]
29. /**
30. * Notes: The following methods is dependent on the above List.
31. */
33. // Use arrays and copy to init List
34. List <String> copyList = Arrays. asList (new String [testList. size ()]);
35. Collections. copy (copyList, testList );
36. System. out. println (copyList );
38. // Use new object and copy to init List
39. CopyList = new ArrayList <String> ();
40. Collections. addAll (copyList, new String [testList. size ()]);
41. Collections. copy (copyList, testList );
42. System. out. println (copyList );
44. // Use the list. subList to init List
45. List <String> strSubList = testList. subList (0, testList. size ());
46. System. out. println (strSubList );
47. };
49. Public static void main (String [] args)
50. {
51. ListUtil. init ();
52. }
53. }

The result is:

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1. [ABC, di-, CID]
2. [ABC, di-, CID]
3. [ABC, di-, CID]
4. [ABC, di-, CID]
5. [ABC, di-, CID]

Java ant compilation error: init: compile: [javac] Compiling 1 source file to D: \ newjspworkspace \ ant02 \ build

It will take two days to understand.