未完 Java Tips & Tricks & Notes

   
Hidden Features of Java:
http://stackoverflow.com/questions/15496/hidden-features-of-java



Double Brace Initialization:
http://howtodoinjava.com/2012/11/20/double-brace-initialization-in-java/
http://stackoverflow.com/questions/924285/efficiency-of-java-double-brace-initialization

        List<String> list = new ArrayList<String>();
        list.add("one");
        list.add("two");
        list.add("three");
        list.add("one");
        list.removeAll(new ArrayList<String>() {{
            add("one");
        }});

Conversion between Delimited String & Collection:
Delimited String -> Collection:
http://stackoverflow.com/questions/7488643/java-how-to-convert-comma-separated-string-to-arraylist

List<String> items = Arrays.asList(str.split("\\s*,\\s*"));

Collection -> Delimited String:
Spring-core.jar 的 StringUtils 是个不错的选择：

StringUtils.collectionToDelimitedString(userIdList, " ")

Paging of Java List:
http://stackoverflow.com/questions/12214894/java-paging-util
http://vozis.blogspot.com/2012/01/paging-in-java.html